Took your advice. I have borrowed a 3 1/8 inch, 2 1/8 inch, and a 2 1/4 inch chassis punches. They are just perfect!
My biggest problem is getting the screw holes aligned perfectly with the gauge mounting holes. I always seem to miss onone and have to "waller" it out some :?
Oh well...
I believe I've got this little project in hand now 8)