VCO Calibration
This was also a simple job.
The only problem with this Studio Electronics MIDI Mini was that it wasn't tracking very well, in particular in the high octaves.
I started out by calibrating the PSU, but it was already almost spot on (at around +/- 10.05V or something) but I did my best to set it to exactly +/-10.00V.
After that I calibrated the VCOs (though I have no memory of the actual procedure today), but I haven't made any specific notes about it so I can only assume it went well and didn't take too long.