Here is another method of doing the FET mod on the MT. This uses both n and p channel FETs (the MT uses 5v gate signals, so the usage of n-fets in place of the p's isn't necessary (so no upside down mounting of fets)).
I've bridged several resistors as well. This is optional. It looks complicated, but avoids running wires all over the board.
Feel free to double or triple stack the fets.