Quote Originally Posted by IanY View Post
So, I have an incredibly difficult decision to make!

Drill or not drill my mobo tray

I am a klutz and test drills on old steel case shows a tendency to drill oval with a hole saw and in general goof up perfectly good equipment

The execution hour is 9 am EST on Saturday. Wife's out for 3 hours and the window of opportunity is tight Otherwise, I'll be subjected to the usual WTF stares and eye rolling
Didn't read enough to see how big a hole your doing but if say 80-120mm the key is in clamping a thing(1/4"-3/8") pice of wood on both sides of the metal to be drilled and if aluminum a sharp holesaw will go thru it like soft butter.
If a 120mm hole(4 1/4" inch hole saw works fine,Home depot,$25.00 ) You really need to make sure the piece is clamped down well and your drill( not cordless) is a perfect 90 degrees to the work and then lock your arm and shoulder into place and drill at medium speed.
TWO hands on the drill at all times.
If a 4" hole saw locks it will whip your arm like a tornado hit it but I've done this thru SM steel cases and they are like 56 Buicks..You just have to do it right and be carefull.
Good Luck.