Well, I am not at that level, I use this board for small projects, like an Arduino. I am learning, so I would abuse this board. Epoxy is to secure the wires, they are 5mils in diameter. This board is very well designed. Since the FTDI schematic is not public, I assumed the big capacitor near the USB is 5V, but it is 3.3V. The board took it gracefully, until I noticed the power supply part is hot. It works well, now.