I have a new M7 ARC Mausingfield with a Trigger Tech Diamond 2 stage trigger that won't adjust down in weight past a certain point. I'm trying to find out if this can be related to sear over engagement. It's not overly stiff when closing the bolt but wondering if it could be tuned better with a different cocking piece. Everything functions fine with sear release and trigger reset. I'm actually fine with the trigger pull weight, but since it won't get any lighter I'm just interested to know why.