ORIGINAL: skylane_182
Lot's of good advice in this thread. Only thing I would add is one of these!
Great Planes Dead Center Hole Locator
You could get by without it, but it sure is handy for mounting Engines, Servo's.......and anything else!
Yes I use this perfusely for so many things! including control horns and anything requiring a #2 screw, including button head screws for canopies... and so much more!