I already have stepper control implemented and working well with the MT-1's using a PIC24 board of my own design, and it is also EQMOD/ASCOM compatible. I know that there are several options to go buy ready made stuff like Ioptron, AWR etc., but for me, the fun is in building the electronics myself.
The MT-1s have notoriously bad gear trains, much slop is added before reaching the worm - the result is uneven high frequency modulation of the drive that results in sub optimal PEC & guiding performance. The solution is to build a microstepping drive and uses a much smaller gear ratio - something like 1:5 vs. 1:120. This gives the additional advantage of also being to run high slewing speeds too.
For me the hardest problem is the mechanicals - brackets, gears etc., I neither have the skills nor the tools to build that part; hence I picked the motors from the commercial GoTo kits. Besides I do not want to use the hand paddles with their built in databases - I'd rather run my mount entirely from my PC through Stellarium or Carte Du Ciel, EQMOD through ASCOM.
That said, if you have not yet finalized your stepper drive design, do look into the Pololu website - they have some neat and easy to use microstepping drivers all soldered on to carrier boards, that will easily spin your MPJA motors.
here's the link:http://www.pololu.co...og/category/120