Jazong- I used a hole saw with my drill to cut through the top. Can't remember the size off hand but it was just barely larger than the copper pipe. The stainless is thin so with a little oil for lube, it cut right through it and it is in terrific shape around the cut with no warping. There is just wood and some fiberglass type insulation between the stainless and the other side. Not too thick.
Thanks Snake- Yeah, I ended up using my old drip tray that I had on my previous ghetto fridge kegerator. I can't decide if I want to alter the tower yet as I think the drunken fat guy is pretty cool. I may at least replace the CRUZCAMPO lettering with my brewery name (Outlaw Joelsy Ales).