----- not at all, as long as you live high up!! Wrap cord (wire, kevlar)
around the spring can, the number of turns corresponding to the number of
turns (surprisingly few) that it would do for a complete record. Put a weight
at the end of the cord corresponding at least to the pull the spring would
have given when fully wound. The weight will sink, and that is why you need
to live high up <extreme grin>. You then have a drive that is more even than
the spring drive. If the cogwheel joined to the spring can is horizontal, you
need a pulley to take your cord over. The only serious problem is that the
bearings are not really made to take the sideways force, so lubricate well
and use it infrequently.
Many thanks, and I certainly will use it VERY infreqeuently. But it is a good idea. OK, I'll stick to my CDs for the time being.