Joe, that is the correct number. Pat had one that I bought a few months ago. It takes up roughly 5" of rack space, and is the usual black rack mounted looking ps. It will be marked with the +/- 15v rating and there should be one or two small Winchester power supply connectors on it. I also misposted in my last msg. RK03's were the 2 meg version like RK05's RK02's were 1/2 the track density. As Tony pointed out, the big difference was individual drive select lines on the diablo, as opposed to 3:8 decoding on rk05's. You can mix rk's and diablos as long as you're careful about the drive selects. Come to think of it, though, you may have trouble making a diablo drive 0 on an RK8E... I have lots of diablo interconnect cables and terminators in my Alto parts stash..