Hi Mike,
I bought the self construct kit and assembled it myself (was pretty easy). I also paid for the IntellyTrack, Goto (of course
), Hand Controller Update and the Conrad Gears.
The electronics part was pretty easy.
Switching to the Conrad gears was a bit more tricky, that involved some drilling so the new gearbox screws aligned up with the original motor screws and by memory I also needed to take the small drive gear off the Conrad motors (they came with the gearboxes) and fit them to the Original HEQ5 motors. A bit of work but still not to bad. And for the more accurate control you get, well worth it.
I also regreased everything, probably something I wouldn't do again. I found it a fair bit of work and re-setting the tolerances between the worm drive and main gear to remove slack was a total pain in the butt, to put it politely.
There is also freeware software to run everything after you install the update. One of the best I've found (and use) is here:-
http://mcucontrol.dyndns.org/MCUControlPlus/
Click on the titles across the top to get the explanations of how to set it up and what it can do. It's pretty cool
Mount Control DSLR Bulb Control Webcam AutoGuiding
Hope this helps.
Regards,
Markus