jlfernan
Well Known Member
A short while ago I match drilled the middle top skin to my QB 9A fuse. The holes in the fuselage were already drilled out to #40 and dimpled by the fellas from the Phillipines. I noticed after I was done that some of the holes in the fuse were slightly enlarged. I'm theorizing that because the flat skin is sitting over a dimple, and we all have noticed that dimpling a hole makse it even larger, the drill bit may not be going straight thru. My question is, since all the parts are precisely prepunched, do you really need to match drill or can you just drill the skin to the correct size and then dimple it?