You are right Dutchy... I remember you correcting me a while back and you haven't changed your story... and I have been enlightened since. Unforunately I haven't had to buy a size I haven't got as I would buy those yellow ones in the future .
Maybe my hint should be to not get those "metal", and buy the TCT tipped one.
Unfortunately I'm one of those most people that bought the wrong bit for wood often only because most shops only sell the metal ones (or a very small selection of the right ones) or the tradies some of us (me) try to imitate have the wrong ones to start with..
At least this tip will help all the other ducks and bunnies that have bought the wrong ones
If your first cut is too short... Take the second cut from the longer end... LBD