I noticed the control board has a connection for 1 more hash board is it possible to connect a 4th board to the miner? Has anyone tried if it works or dose it need a custom firmware to initialize the 4th board? I was thinking about building its own case for it with 4 boards instead of 3. I read on another thread that some one fried one of their boards and ordered a new hash board for 200 bucks form bitmain. Thoughts?