Just received a used 5/16-14 Cynergy. It fits my Schon and my Mezz (which has a bullet nose). My Tascarella and my Adam Balabushka don't screw down all the way. Wondering if this is common challenge with Cynergy. I recall when I got my Tiger shaft 5/16-14, it also didn't go all the way down only Tascarella, and Tiger had to run a tap. But that had a phenolic insert. I'm going to run a tap in to the Cynergy shaft, unless someone (that I trust on here) says differently.