It's true! Mine was $128 on Ebay, with $16 shipping. It's only 6.7", but it still works just fine at 72v. I added a blower for another $30, and now have no heating issues whatsoever. I finished etching the power section of the second controller. I've also looked into opto-isolation. I know what parts to get, at least for the isolators. I'm not sure about the actual implementation yet. I haven't finished reading up on it yet. I also need to order 2 ATMega16's. It's always good to have a spare, for when you plug one in backwards!
