heres the link for the hole punch...
http://www.mouser.com/search/Refine...ield&Msb=0&Ntk=Mouser_Wildcards&Ntt=*deltron*
Its the only place that I found that stocked metric sizes in the states.
pretty easy to use actually, it just recquires alot of work and strength as the die starts to get dull after about 4 punches.
Basically though it is a hand operated tool using only a wrench around the driving bolt to basically force the die through the metal. Consists of the bolt, nut and die (cutter).
Just need to buy a 10mm pilot drill bit to put the main bolt of the punch through to guide it. I just measured out my holes with a sharpie on the underside of the panel, drilled my pilot holes and started cranking the thing down, it eventually pushed all the way through the metal and leaves you with a perfect hole. Since it is relying on the pilot hole there is no fear of anything slipping. I could not find a 10mm bit so I opted for the easier to find 9.745 and it worked out fine.
Important to note though that you should have the cutter on the top side (graphics) side on the control panel. That way any bending on the edge of the hole will be pointing downwards and not prevent your buttons from laying flush on the panel.
Its pretty easy but it is a pain in the ass. Took me like 3 hours to punch 6 holes in my
panel.