diff --git a/firmware/controllers/trigger/trigger_emulator_algo.cpp b/firmware/controllers/trigger/trigger_emulator_algo.cpp
index 8e09a85117..db3d2e8484 100644
--- a/firmware/controllers/trigger/trigger_emulator_algo.cpp
+++ b/firmware/controllers/trigger/trigger_emulator_algo.cpp
@@ -55,6 +55,8 @@ void TriggerEmulatorHelper::handleEmulatorCallback(PwmConfig *state, int stateIn
 	bool thirdWheelState = state->multiWave.waves[2].pinStates[prevIndex];
 	int new3rdWheelState = state->multiWave.waves[2].pinStates[stateIndex];
 
+	// todo: code duplication with TriggerStimulatorHelper::nextStep?
+
 	if (primaryWheelState != newPrimaryWheelState) {
 		primaryWheelState = newPrimaryWheelState;
 		fireShaftSignal(primaryWheelState ? SHAFT_PRIMARY_RISING : SHAFT_PRIMARY_FALLING);
diff --git a/firmware/controllers/trigger/trigger_simulator.cpp b/firmware/controllers/trigger/trigger_simulator.cpp
index 2ec233c518..b05fc50d88 100644
--- a/firmware/controllers/trigger/trigger_simulator.cpp
+++ b/firmware/controllers/trigger/trigger_simulator.cpp
@@ -35,6 +35,8 @@ void TriggerStimulatorHelper::nextStep(TriggerState *state, TriggerShape * shape
 	bool thirdWheelState = shape->wave.getChannelState(2, prevIndex);
 	bool new3rdWheelState = shape->wave.getChannelState(2, stateIndex);
 
+	// todo: code duplication with TriggerEmulatorHelper::handleEmulatorCallback?
+
 	if (primaryWheelState != newPrimaryWheelState) {
 		primaryWheelState = newPrimaryWheelState;
 		trigger_event_e s = primaryWheelState ? SHAFT_PRIMARY_RISING : SHAFT_PRIMARY_FALLING;