I am building a WM AT-6 that does not come with a radial engine insert - would someone please measure the OD of the Top Flite radial engine insert for me so that I can determine if I can use it. Separate comment - I plan to order some of the Epo Grip and think it is an idea whose time is here. It was a real benefit to me to have MinnFlyer share it with us in his review. I may be wrong but, I think these folks had a booth at last years Top Gun and I failed to purchase any of it, silly me, now I can pay for the shipping.

Howard