I pulled the trick where you make something to disconnect the head 
control wire while the drive spins up.  That worked.  This RD runs quiet, 
so I almost didn't catch the noise difference when the drive is stopped 
and when it's running.  The only thing is, I didn't have enough junk 
around to make the little circuit described, so I just ran 2 leads out 
the front of the case and I'm attaching a switch there.  Kinda like the 
run/stop switch on RA81s...
Now, I'm off to try installing again!