I have multiple crystal sync projects going on at the same time but I still should have time for one additional project this year :D  I was thinking it could be usable to do a crystal sync motor modification for these old straight viewfinder Konvas models which use the older style rheostat motor.   I could do the mod to my own camera first and then install it to other person's motors as well or just send the ready-to-install boards and parts so that the end user could instal