Mods to the SP-10 have been done, there where a couple of HFW articles many years back detailing regulator and PSU mods for the deck plus theres a few owners who have completley re-designed the electronics :eek: this is primarily DIY stuff though....however, there's at least one UK company who can supply an upgraded or replacement PSU.
The trouble with the SP-10 is its age. You can replace 'lytic caps etc but the decks also need proper electrical adjustment and setup with attention paid to cleaning and oiling of the bearing. When setup correctly they are impressive, when not their age works against them.

