NEW Edward Byers Company digital stepper motor controller, includes
ST autoguider outlet, hand controls, power supply, cables, complete
(minus the two Sigma green 5-phase stepper motors). These are ~$1500
new, this one is new with some discoloration on the case, but not
used other than it tested good and guaranteed against DOA. The first
$475 can have it, plus $20 shipping in the US, actual cost elsewhere.
If you have one of these already, this makes for a great spare just
in case your observatory is hit by a power surge or lightning.If you
don't have one but want one, Ed Byers can sell you the motors,
and this unit is programmed for direct replacement of a 1 RPM
RA drive motor with this unit (this includes over 95% of Edward
Byers drive gears).