Mark:

You make it sound as a very difficult taks, actually, it is so easy you wouldn't believe, as far as I know there is no need at all to rebalance the assembly, my 750 has the compressor either keyed or pressure fitted to the shaft so the parts never moved from their "in balance" positions, I just unscrew the original nut and put on the new one, by the way the compressor nut is reverse threaded, so it will loosen in the clockwise direction. Two weeks ago I did this to a friends 750 that had not been run in about six years, we put the new parts in and had it running on autostart in less than 45 minutes....

If you need to know the steps to take on this conversion let me know and I will post them.