I was careful with reassembly. I think I may have accidentally retapped one screw on the bottom. Here's some very poor pictures from disassembly. For the PX150 access to the electronics is very easy, you can get to them without pulling the speakers if you know which screws to drop. http://imgur.com/hZzFnnD,1UZDAEr,0acoosK,3OBYF5P,mS9PdKj