Thanks all for the tips. Although I like the cardboard solution the best I discovered I have the "U" bracket already for stacking two drives in the rear (no 3) bay. I just didn't realize that you need to bend the arms in. Doesn't seem like a real "Apple-like" solution, and I thought I was missing a plate or something. Now I've got four drives in the machine! (Can't have too much storage in a media server). Only problem is one of my ATA ribbon cables is too short to span between two drives in bays 1 & 2, so they're awkwardly stacked until I can find a longer cable. Thanks again, listers! Carlos -- Go Mets!