First job today, mount that 13V pass transistor on the main heatsink.....there is a 220mV current draw on this supply so no issue, it just runs hot!! Needs a lot of heat dissipation that sucker..... I would recommend mounting the +/-80V and the 13V pass transistors on the main Heatsink, wouldn't worry about the 8V, doesn't run hot enough to justify moving it in my opinion.... Going to have a look at this tuner issue and re-cap the rest of this beast now... Everything is nice and cool in regulated supply world, very happy with that!!