Lots to like here. A couple things for you to consider:
1. I'm not a fan of putting the compressor on the electronics board. The terminals on the speed controllers tend to vibrate loose and that's a big source of vibration.
2. Use some
cable tie bases to fasten down your power wires, rather than the tape. Use a cable tie near each speed controller to make a bundle of the two input wires. This makes them move less at the speed controller. The bases are available at Home Depot.
3. Are you planning on putting fans on your Talons?
4. You're using polycarbonate (Lexan) and not acrylic for the board, right?