Long-discontinued JMI MotoDec for Vixen mounts with JMI DRO handset. I upgraded the wire "belt" with a real chain drive that will last forever (the belt fell apart on me). Everything works perfectly. The only issue I had was I tried this with my Polaris mount but the gear ratio is not correct for this smaller mount, so I suspect this will work correctly with a Super or Great Polaris mount. I don't have one to test so no guarantees this is correct - please examine the gears in the photo.
$140 for everything, including the new chain which cost $40 alone. Shipping included in CONUS.