Phantom Ion screw size
 

I am borrowing a guys Fantom Ion. One of the end bell timing screws is missing. It was missing when I got it, but I wanted to try and find the missing screw for him at ACE or maybe a local LHS. It is NOT a 3mm screw. And my 1/16th wrench seems to fit the screws. So I am guessing 4-40?

I think is the motor

http://www.rctech.net/forum/attachme...s-p7280060.jpg