I've never drilled any extra holes, Missleman. I HAVE pulled control surfaces off crashed planes and found the CA to wick in between 1/4 and 3/8". Many trailing edges are only that wide, so it's plenty. I've never had an in-flight failure. Some CA hinges seem to have a shiny finish on them that I believe would inhibit the CA soaking into the hinge. Avoid those and you're OK.

Dr.1