diff --git a/CMakeLists.txt b/CMakeLists.txt
index 80e5d3e..db0772c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,8 +127,8 @@ add_library(solanaceae_ngchs2
 	./solanaceae/ngc_hs2/ngc_hs2_sigma.hpp
 	./solanaceae/ngc_hs2/ngc_hs2_sigma.cpp
 
-	#./solanaceae/ngc_hs2/ngc_hs2_recv.hpp
-	#./solanaceae/ngc_hs2/ngc_hs2_recv.cpp
+	./solanaceae/ngc_hs2/ngc_hs2_rizzler.hpp
+	./solanaceae/ngc_hs2/ngc_hs2_rizzler.cpp
 )
 target_include_directories(solanaceae_ngchs2 PUBLIC .)
 target_compile_features(solanaceae_ngchs2 PUBLIC cxx_std_17)
diff --git a/solanaceae/ngc_hs2/ngc_hs2_rizzler.cpp b/solanaceae/ngc_hs2/ngc_hs2_rizzler.cpp
new file mode 100644
index 0000000..e2918a9
--- /dev/null
+++ b/solanaceae/ngc_hs2/ngc_hs2_rizzler.cpp
@@ -0,0 +1,123 @@
+#include "./ngc_hs2_rizzler.hpp"
+
+#include <solanaceae/tox_contacts/tox_contact_model2.hpp>
+
+#include <solanaceae/tox_contacts/components.hpp>
+
+#include <solanaceae/message3/registry_message_model.hpp>
+
+#include <iostream>
+
+NGCHS2Rizzler::NGCHS2Rizzler(
+	Contact3Registry& cr,
+	RegistryMessageModelI& rmm,
+	ToxContactModel2& tcm,
+	NGCFT1& nft
+) :
+	_cr(cr),
+	_rmm(rmm),
+	_tcm(tcm),
+	_nft(nft),
+	_nftep_sr(_nft.newSubRef(this))
+{
+	_nftep_sr
+		.subscribe(NGCFT1_Event::recv_init)
+		.subscribe(NGCFT1_Event::recv_data)
+		.subscribe(NGCFT1_Event::recv_done)
+	;
+}
+
+NGCHS2Rizzler::~NGCHS2Rizzler(void) {
+}
+
+float NGCHS2Rizzler::iterate(float delta) {
+	for (auto it = _request_queue.begin(); it != _request_queue.end();) {
+		it->second.timer += delta;
+
+		if (it->second.timer < it->second.delay) {
+			it++;
+			continue;
+		}
+
+		if (!_cr.all_of<Contact::Components::ToxGroupPeerEphemeral>(it->first)) {
+			// peer nolonger online
+			it = _request_queue.erase(it);
+			continue;
+		}
+
+		const auto [group_number, peer_number] = _cr.get<Contact::Components::ToxGroupPeerEphemeral>(it->first);
+
+		// now in sec
+		const uint64_t ts_now = Message::getTimeMS()/1000;
+
+		if (sendRequest(group_number, peer_number, ts_now, ts_now-(60*48))) {
+			// TODO: requeue
+			// TODO: segment
+			// TODO: dont request already received ranges
+
+			//// on success, requeue with longer delay (minutes)
+
+			//it->second.timer = 0.f;
+			//it->second.delay = _delay_next_request_min + _rng_dist(_rng)*_delay_next_request_add;
+
+			//// double the delay for overlap (9m-15m)
+			//// TODO: finetune
+			//it->second.sync_delta = uint8_t((it->second.delay/60.f)*2.f) + 1;
+
+			//std::cout << "ZOX #### requeued request in " << it->second.delay << "s\n";
+
+			it++;
+		} else {
+			// on failure, assume disconnected
+			it = _request_queue.erase(it);
+		}
+
+		// just choose something small, since we expect a response might arrive soon
+		//min_interval = std::min(min_interval, _delay_between_syncs_min);
+	}
+
+
+	return 1000.f;
+}
+
+bool NGCHS2Rizzler::sendRequest(
+	uint32_t group_number, uint32_t peer_number,
+	uint64_t ts_start, uint64_t ts_end
+) {
+	std::cout << "NGCHS2Rizzler: sending request to " << group_number << ":" << peer_number << " (" << ts_start << "," << ts_end << ")\n";
+	return false;
+}
+
+bool NGCHS2Rizzler::onEvent(const Events::NGCFT1_recv_init&) {
+	return false;
+}
+
+bool NGCHS2Rizzler::onEvent(const Events::NGCFT1_recv_data&) {
+	return false;
+}
+
+bool NGCHS2Rizzler::onEvent(const Events::NGCFT1_recv_done&) {
+	return false;
+}
+
+bool NGCHS2Rizzler::onToxEvent(const Tox_Event_Group_Peer_Join* e) {
+	const auto group_number = tox_event_group_peer_join_get_group_number(e);
+	const auto peer_number = tox_event_group_peer_join_get_peer_id(e);
+
+	const auto c = _tcm.getContactGroupPeer(group_number, peer_number);
+
+	if (!c) {
+		return false;
+	}
+
+	if (!_request_queue.count(c)) {
+		_request_queue[c] = {
+			_delay_before_first_request_min + _rng_dist(_rng)*_delay_before_first_request_add,
+			0.f,
+			0,
+		};
+	}
+
+	return false;
+}
+
diff --git a/solanaceae/ngc_hs2/ngc_hs2_rizzler.hpp b/solanaceae/ngc_hs2/ngc_hs2_rizzler.hpp
new file mode 100644
index 0000000..1e8c424
--- /dev/null
+++ b/solanaceae/ngc_hs2/ngc_hs2_rizzler.hpp
@@ -0,0 +1,60 @@
+#pragma once
+
+#include <solanaceae/contact/contact_model3.hpp>
+
+#include <solanaceae/ngc_ft1/ngcft1.hpp>
+
+// fwd
+class ToxContactModel2;
+class RegistryMessageModelI;
+
+class NGCHS2Rizzler : public ToxEventI, public NGCFT1EventI {
+	Contact3Registry& _cr;
+	RegistryMessageModelI& _rmm;
+	ToxContactModel2& _tcm;
+	NGCFT1& _nft;
+	NGCFT1EventProviderI::SubscriptionReference _nftep_sr;
+
+	// 5s-6s
+	const float _delay_before_first_request_min {5.f};
+	const float _delay_before_first_request_add {1.f};
+
+	std::uniform_real_distribution<float> _rng_dist {0.0f, 1.0f};
+	std::minstd_rand _rng;
+
+	struct RequestQueueInfo {
+		float delay; // const
+		float timer;
+		uint64_t sync_delta; //?
+	};
+	// request queue
+	// c -> delay, timer
+	std::map<Contact3, RequestQueueInfo> _request_queue;
+
+	public:
+		NGCHS2Rizzler(
+			Contact3Registry& cr,
+			RegistryMessageModelI& rmm,
+			ToxContactModel2& tcm,
+			NGCFT1& nf
+		);
+
+		~NGCHS2Rizzler(void);
+
+		float iterate(float delta);
+
+	protected:
+		bool sendRequest(
+			uint32_t group_number, uint32_t peer_number,
+			uint64_t ts_start, uint64_t ts_end
+		);
+
+	protected:
+		bool onEvent(const Events::NGCFT1_recv_init&) override;
+		bool onEvent(const Events::NGCFT1_recv_data&) override;
+		bool onEvent(const Events::NGCFT1_recv_done&) override;
+
+	protected:
+		bool onToxEvent(const Tox_Event_Group_Peer_Join* e) override;
+};
+