Not really Do-Clo. I routinely use mosfet transistors that are the same size as the ones already on the board and can handle 4-500ma constant and several amps in a pulse/surge situation. Thats without heatsinking as they have very low on resistance values and dont produce as much heat as a normal transistor.

As it would only be driving during the clash this wouldnt be a problem. As I said its all well within the realms of possibility. What lets its down is the physical engineering aspects. That and I wouldnt like to have to replace all those surface mount resistors, that would be a right royal pain in the backside.