I contacted Ian, and he mentions "It's not an issue with Trigger hangers. We have seen issues with Trigger Tech with any of our actions. They have batch to batch variations in their sear heights and has caused either skating or hard close of the bolts. Trigger Tech has been great with customers about replacing triggers that don't work properly. They are also the most installed trigger in our actions, so there are elevated cases of trigger issues just based on shear volume.". I have installed TT in three Kelbly actions, two diamonds in two Atlas Tactical and one Special in an Atlas Lite, no issues so far.