"BTW, how did you solved (or plan to solve) the problem with turning on PowerCC with a keyboard? There will be no necessary volages supplied for ADB bus - since you will throw away analogue board."
The performa 6360 power supply supplies the ADB power lines to the 6360 connector, it works just the same as within a real 6360. All I did was attach the 6-wire 6360 ADB ribbon to the first 6 pins of my 630 connector...no rewiring or soldering required.