Thanks for the reply,paul. Sounds like you have put a lot of thought into this design. The bars on my Kelly controller are rather close, I have to make sure the lug bolts don't touch.
No wonder they burst into a cloud of smoky badness! Is the heat spreader the large block of metal M- sits on? I used to work with metals some years ago, and aluminum will dissipate heat more than copper, but you may have some warping. Copper is a whole lot harder(as you know from driling the stuff.) If it holds its shape it should work ok, kind of like an internal heatsink! take care, Watt
