For Nick, and Sean. Number one thing I can suggest is push 24 Volts in to the final. It's very easy to add in another supply jack for powering the final separately.? Double power in = triple power out, greatly improves your QRP signal strength. And you don't have to do the alignment process again. It's not going to change that much. Be sure you have enough heat dissipation. Combine this with a high antenna and you could topple W1LY as QRP king of the mountain.
My problem is they hear me, but I can't hear them. I wish all BITX'ers would include 24 Volts as a switch in option for when it's needed. I used the extra hook up wires with one set on each DC Jack, and just open the box and swap connectors on the board. You'll need a higher voltage supply and a buck converter to step it down to 24V.?
Sean, I think you are one of the closest stations to me and we should be able to hear each other even with 12 Volts barefoot.