Having hooked up the ailerons with the required travel now demonstratable, I trial installed the Infinity stick grips I've had for a while, and note serious interference with the armrest. To clear the window when outboard and achieve the required 20 degrees at the aileron I have to cut away most of the cover I have made down near the pivot point. The base of the stick fouls the armrest at both ends of what I imagine the elevator travel will be. Hmmmmmm.