Hi, guys! I finished building the bottlehead crack amp a few weeks ago, and really enjoyed it, and I decided to add the speedball upgrade. After the installation, I release the left CS4 board's LED didn't lit up, and after resistance check on the transistors, I wanted to be sure, so I switch the transistors between the A and B, but as I was trying to take off the transistor, I burned the board. I'm wondering if there a way to buy replacement cs 4 boards? Thanks!