TriggerTech and BCL102 safety selector binding.

[Kwattro]

I installed a drop in TriggerTech trigger in a Gen2 BCL102 and now the safety won't work. Binds up when trying to rotate it. I've triple checked the install, confirmed the instructions, talked with tech support. My guess is the safety isn't to spec, or the lower isn't to spec. Before I go further I wanted to check with the minds here in case I'm missing something silly.