mine is a KF 3 with some 4 upgrades. The strut ends are the welded in stud type both front and rear on outbound ends. They are the 5/16x24 thread, same as AN5.
woops, I have been working in metric In excess. I meant to say the threaded end of the lift strut used in an SS7 is tapped to H3 specs not M3. Find attached a data sheet explaining tap specs.
Git it all done today. Turned out nice! Flew for a while today and that plane just does so good. soft flyer. Dont know how to post pix to show what I did to fix the end.