A friend of mine had a Mephisto. I had been doing some playing around inside a G&D Transforms Ultimate transport I was using at the time and I ordered enough parts to do the power supplies in both with Harris Hyperfast diodes and Muse caps and the Mephisto came to life.....My friend was so encouraged that he sent the unit to G&D Transforms who put in the new clock and output board along with their own pore supplies to run these boards with good results. G&D stopped taking in mods, but still sells clocks and output boards. The grounding in the Mephisto is all series rather than star, but it is such a beautiful unit it was worth the work and time involved to make it work a bit better. My friend sold his Mephisto and purchased a G&D UTP-1 transport, cheap upstart that was a touch better than the modified Mephisto.....If this interests you call G&D at 602-650-1155 or email at Transforms@aol.com as the Mephisto is probably the prettiest unit out there and it can be made to perform with the best with a little time and effort......