Thanks Matt. I'm pretty careful to set up each wing servo so that the angle between the horn and pushrod is at 90 degrees. I assumed this would give equal throw to the ailerons. I will experiment adding a bit of differential and using some up/down elevator on the cork screw side to see what effect it has. Not all, but some of my planes has an axial roll one direction and somewhat corkscrew the other direction. I was curious as to why that was happening.

Mike