Apex Aviation

In our continuing series, author Bob Fritz explains how to use a boring head to drill odd-size or big holes. Hint 1: The bigger the hole, the slower the going. Hint 2: The traveling rest, which moves with the cutting tool, braces the material in two directions to minimize flexing.

Why do seemingly simple modifications wind up taking so much time to complete?

Do kit aircraft owners have to comply with ADs? Steve Ells examines the dos and donts of this tricky question.