I don't use mine a lot either. I have three of them. One stock that I haven't booted in a while. One has a 575 motherboard and an Apple II card. I was playing some Apple II games on it the other day. One has a 6500 motherboard with a G3 card. I haven't used that in a bit. Everything was packed in storage for a few years. I had planned on putting a motherboard from a tray loading iMac in one so I could run OSX and had the parts put aside for it. Now I'm wondering if it's a little late in the game to do this mod. Also which machine would I do it to? I'd like to keep the stock one and the 575 one the way they are. I put a lot of effort and wore out a few brain cells doing the 6500 conversion so I'd hate to redo that one even though it's really the best choice.