I have a older Mac Mini that I'm thinking of using as a TM backup. I have a 2GB 3.5" that would suit this. Has anyone franken a 3.5" drive on top a Mini I'm thinking of getting a data doubler (removing the opti and inserting that there), then using sata cable for data, and external USB power supply cable for power. the 3.5 drive would be covered with a fake mini top case. This would give me SATAII speed for the time machine.