diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b2c67d..ffbe44b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,6 +58,7 @@ add_library(solanaceae_sha1_ngcft1
 	./solanaceae/ngc_ft1_sha1/components.cpp
 
 	./solanaceae/ngc_ft1_sha1/chunk_picker.hpp
+	./solanaceae/ngc_ft1_sha1/chunk_picker.cpp
 
 	./solanaceae/ngc_ft1_sha1/participation.hpp
 	./solanaceae/ngc_ft1_sha1/participation.cpp
diff --git a/solanaceae/ngc_ft1_sha1/chunk_picker.cpp b/solanaceae/ngc_ft1_sha1/chunk_picker.cpp
new file mode 100644
index 0000000..227687f
--- /dev/null
+++ b/solanaceae/ngc_ft1_sha1/chunk_picker.cpp
@@ -0,0 +1,132 @@
+#include "./chunk_picker.hpp"
+
+#include <solanaceae/contact/contact_model3.hpp>
+#include <solanaceae/object_store/object_store.hpp>
+
+#include "./components.hpp"
+
+#include <entt/container/dense_map.hpp>
+#include <entt/container/dense_set.hpp>
+
+#include <cstddef>
+#include <cstdint>
+#include <algorithm>
+
+#include <iostream>
+
+std::vector<ChunkPicker::ContentChunkR> ChunkPicker::updateChunkRequests(
+	Contact3Handle c,
+	ObjectRegistry& objreg,
+	ReceivingTransfers& rt
+	//NGCFT1& nft
+) {
+	std::vector<ContentChunkR> req_ret;
+
+	// count running tf and open requests
+	// TODO: implement
+	const size_t num_requests = max_tf_chunk_requests;
+
+	// while n < X
+	while (false && !participating_unfinished.empty()) {
+		// round robin content (remember last obj)
+		if (!objreg.valid(participating_in_last)) {
+			participating_in_last = participating_unfinished.begin()->first;
+			//participating_in_last = *participating_unfinished.begin();
+		}
+		assert(objreg.valid(participating_in_last));
+
+		auto it = participating_unfinished.find(participating_in_last);
+		// hard limit robin rounds to array size time 100
+		for (size_t i = 0; req_ret.size() < num_requests && i < participating_unfinished.size()*100; i++) {
+			if (it == participating_unfinished.end()) {
+				it = participating_unfinished.begin();
+			}
+
+			if (it->second.skips < it->second.should_skip) {
+				it->second.skips++;
+				continue;
+			}
+
+			ObjectHandle o {objreg, it->first};
+
+			// intersect self have with other have
+			if (!o.all_of<Components::RemoteHave, Components::FT1ChunkSHA1Cache, Components::FT1InfoSHA1>()) {
+				// rare case where no one other has anything
+				continue;
+			}
+
+			const auto& cc = o.get<Components::FT1ChunkSHA1Cache>();
+			if (cc.have_all) {
+				std::cerr << "ChunkPicker error: completed content still in participating_unfinished!\n";
+				continue;
+			}
+
+			const auto& others_have = o.get<Components::RemoteHave>().others;
+			auto other_it = others_have.find(c);
+			if (other_it == others_have.end()) {
+				// rare case where the other is participating but has nothing
+				continue;
+			}
+
+			const auto& other_have = other_it->second;
+
+			BitSet chunk_candidates = cc.have_chunk;
+			if (!other_have.have_all) {
+				// AND is the same as ~(~A | ~B)
+				// that means we leave chunk_candidates as (have is inverted want)
+				// merge is or
+				// invert at the end
+				chunk_candidates
+					.merge(other_have.have.invert())
+					.invert();
+				// TODO: add intersect for more perf
+			} else {
+				chunk_candidates.invert();
+			}
+			const auto total_chunks = o.get<Components::FT1InfoSHA1>().chunks.size();
+			// TODO: trim off round up to 8, since they are now always set
+
+			// now select (globaly) unrequested other have
+			// TODO: pick strategies
+			// TODO: how do we prioratize within a file?
+			//  - first (walk from start (or readhead?))
+			//  - random (choose random start pos and walk)
+			//  - rarest (keep track of rarity and sort by that)
+			//  - steaming (use read head to determain time critical chunks, potentially over requesting, first (relative to stream head) otherwise
+			//    maybe look into libtorrens deadline stuff
+			//  - arbitrary priority maps/functions (and combine with above in rations)
+
+			// simple, we use first
+			for (size_t i = 0; i < total_chunks && req_ret.size() < num_requests && i < chunk_candidates.size_bits(); i++) {
+				if (!chunk_candidates[i]) {
+					continue;
+				}
+
+				// i is a candidate we can request form peer
+
+				// first check against double requests
+				if (std::find_if(req_ret.cbegin(), req_ret.cend(), [&](const auto& x) -> bool {
+					return false;
+				}) != req_ret.cend()) {
+					// already in return array
+					// how did we get here? should we fast exit? if simple-first strat, we would want to
+					continue; // skip
+				}
+
+				// TODO: also check against globally running transfers!!!
+
+
+				// if nothing else blocks this, add to ret
+				req_ret.push_back(ContentChunkR{o, i});
+			}
+		}
+	}
+
+	// -- no -- (just compat with old code, ignore)
+	// if n < X
+	//   optimistically request 1 chunk other does not have
+	//   (don't mark es requested? or lower cooldown to re-request?)
+
+	return req_ret;
+}
+
diff --git a/solanaceae/ngc_ft1_sha1/chunk_picker.hpp b/solanaceae/ngc_ft1_sha1/chunk_picker.hpp
index df99887..46b572d 100644
--- a/solanaceae/ngc_ft1_sha1/chunk_picker.hpp
+++ b/solanaceae/ngc_ft1_sha1/chunk_picker.hpp
@@ -1,19 +1,18 @@
 #pragma once
 
-#include <algorithm>
 #include <solanaceae/contact/contact_model3.hpp>
 #include <solanaceae/object_store/object_store.hpp>
 
 #include "./components.hpp"
 
+#include "./receiving_transfers.hpp"
+
 #include <entt/container/dense_map.hpp>
 #include <entt/container/dense_set.hpp>
 
 #include <cstddef>
 #include <cstdint>
 
-#include <iostream>
-
 //#include <solanaceae/ngc_ft1/ngcft1.hpp>
 
 // goal is to always keep 2 transfers running and X(6) requests queued up
@@ -58,117 +57,9 @@ struct ChunkPicker {
 	std::vector<ContentChunkR> updateChunkRequests(
 		Contact3Handle c,
 		ObjectRegistry& objreg,
-		size_t num_requests
+		ReceivingTransfers& rt
 		//NGCFT1& nft
-	) {
-		std::vector<ContentChunkR> req_ret;
-
-		// count running tf and open requests
-		// TODO: replace num_requests with this logic
-
-		// while n < X
-		while (false && !participating_unfinished.empty()) {
-			// round robin content (remember last obj)
-			if (!objreg.valid(participating_in_last)) {
-				participating_in_last = participating_unfinished.begin()->first;
-				//participating_in_last = *participating_unfinished.begin();
-			}
-			assert(objreg.valid(participating_in_last));
-
-			auto it = participating_unfinished.find(participating_in_last);
-			// hard limit robin rounds to array size time 100
-			for (size_t i = 0; req_ret.size() < num_requests && i < participating_unfinished.size()*100; i++) {
-				if (it == participating_unfinished.end()) {
-					it = participating_unfinished.begin();
-				}
-
-				if (it->second.skips < it->second.should_skip) {
-					it->second.skips++;
-					continue;
-				}
-
-				ObjectHandle o {objreg, it->first};
-
-				// intersect self have with other have
-				if (!o.all_of<Components::RemoteHave, Components::FT1ChunkSHA1Cache, Components::FT1InfoSHA1>()) {
-					// rare case where no one other has anything
-					continue;
-				}
-
-				const auto& cc = o.get<Components::FT1ChunkSHA1Cache>();
-				if (cc.have_all) {
-					std::cerr << "ChunkPicker error: completed content still in participating_unfinished!\n";
-					continue;
-				}
-
-				const auto& others_have = o.get<Components::RemoteHave>().others;
-				auto other_it = others_have.find(c);
-				if (other_it == others_have.end()) {
-					// rare case where the other is participating but has nothing
-					continue;
-				}
-
-				const auto& other_have = other_it->second;
-
-				BitSet chunk_candidates = cc.have_chunk;
-				if (!other_have.have_all) {
-					// AND is the same as ~(~A | ~B)
-					// that means we leave chunk_candidates as (have is inverted want)
-					// merge is or
-					// invert at the end
-					chunk_candidates
-						.merge(other_have.have.invert())
-						.invert();
-					// TODO: add intersect for more perf
-				} else {
-					chunk_candidates.invert();
-				}
-				const auto total_chunks = o.get<Components::FT1InfoSHA1>().chunks.size();
-				// TODO: trim off round up to 8, since they are now always set
-
-				// now select (globaly) unrequested other have
-				// TODO: pick strategies
-				// TODO: how do we prioratize within a file?
-				//  - first (walk from start (or readhead?))
-				//  - random (choose random start pos and walk)
-				//  - rarest (keep track of rarity and sort by that)
-				//  - steaming (use read head to determain time critical chunks, potentially over requesting, first (relative to stream head) otherwise
-				//    maybe look into libtorrens deadline stuff
-				//  - arbitrary priority maps/functions (and combine with above in rations)
-
-				// simple, we use first
-				for (size_t i = 0; i < total_chunks && req_ret.size() < num_requests && i < chunk_candidates.size_bits(); i++) {
-					if (!chunk_candidates[i]) {
-						continue;
-					}
-
-					// i is a candidate we can request form peer
-
-					// first check against double requests
-					if (std::find_if(req_ret.cbegin(), req_ret.cend(), [&](const auto& x) -> bool {
-						return false;
-					}) != req_ret.cend()) {
-						// already in return array
-						// how did we get here? should we fast exit? if simple-first strat, we would want to
-						continue; // skip
-					}
-
-					// TODO: also check against globally running transfers!!!
-
-
-					// if nothing else blocks this, add to ret
-					req_ret.push_back(ContentChunkR{o, i});
-				}
-			}
-		}
-
-		// -- no -- (just compat with old code, ignore)
-		// if n < X
-		//   optimistically request 1 chunk other does not have
-		//   (don't mark es requested? or lower cooldown to re-request?)
-
-		return req_ret;
-	}
+	);
 
 	//   - reset on disconnect?
 	void resetPeer(
diff --git a/solanaceae/ngc_ft1_sha1/sha1_ngcft1.hpp b/solanaceae/ngc_ft1_sha1/sha1_ngcft1.hpp
index 993df4b..217cee6 100644
--- a/solanaceae/ngc_ft1_sha1/sha1_ngcft1.hpp
+++ b/solanaceae/ngc_ft1_sha1/sha1_ngcft1.hpp
@@ -77,11 +77,6 @@ class SHA1_NGCFT1 : public ToxEventI, public RegistryMessageModelEventI, public
 
 	std::atomic_bool _info_builder_dirty {false};
 	std::mutex _info_builder_queue_mutex;
-	//struct InfoBuilderEntry {
-		//// called on completion on the iterate thread
-		//// (owning)
-		//std::function<void(void)> fn;
-	//};
 	using InfoBuilderEntry = std::function<void(void)>;
 	std::list<InfoBuilderEntry> _info_builder_queue;
 
@@ -94,7 +89,7 @@ class SHA1_NGCFT1 : public ToxEventI, public RegistryMessageModelEventI, public
 	public: // TODO: config
 		bool _udp_only {false};
 
-		size_t _max_concurrent_in {6};
+		size_t _max_concurrent_in {4};
 		size_t _max_concurrent_out {8};
 		// TODO: probably also includes running transfers rn (meh)
 		size_t _max_pending_requests {32}; // per content