icehawk21,
I took the cutting approach, first for the mega-CD changer and then with the 990, but still found that it was aesthetically unpleasing. In addtion my M2200 would overheat with the doors closed and the open door masking some of the drivers of the adjacent speaker. I went with dsandfort and just got a Salamander rack which looks great and has optimal (shelf) adjustment. If you have a chance don't mind the fairly steep price tag I would exchange your unit and go with the Salamander stuff. Good Luck!