Rick I guess I forgot to mention that a good 90% of the holes I drill get a touch of the countersink on each side, if not for the reasons you do with the drill, then just for the esthetics. It just makes the hole look and work right!
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.