I have a Funtana 40, both tail servos moved next to the throttle servo, OS Surpass 70 w/ 14-4 wood prop, C/G 5-1/2"
I've read all the posts regarding the inadvert roll at the top of an inside loop, and haven't been able to solve the problem. I've been flying for only 1 year and on my 3rd plane, so I'm trying to understand all I can about the hobby.

I noticed that when I do an outside loop it does it perfect. Could this mean that the "roll" only happens as the plane reaches a "stall point" as at the top of an inside loop? And if so, could "Side Thrust" be the culprit?