On Jan 16, 10:13*pm, Steve Turner
wrote:

Thanks! *Yeah, the jigs get the job done, but I've been pondering how to
construct my "second generation" jigs, complete with offsetting guide rollers
to keep the shells firmly in position, and with motors to spin the shells
(slowly) during milling so that I don't have to spin them by hand. *:-)

How about pedal or treadle driven?

R