I use a laptop power supply to power from the mains. I've also built a voltage regulator unit which I now plug into before plugging into the mount.
The regulator doesn't regulate power from the laptop supply - I included a bypass from the input to an output with just a diode for polarity protection - but has also 2 outputs regulated at 12 VDC. Why? Because my Orion Starshoot also needs 12 V and this frees up a point on the powerboard. The same (12 V) lead can power the mirror fan while I'm messing around with setting up. I put the 2nd 12 V output in just as a spare.
Plus the regulator pack velcros onto the mount head so the leads don't all get wrapped around and caught on things during a slew.
;-)
Mick