Did it last night.
It's not that difficult, but desoldering is always finicky. You have to be careful not to damage the traces on the PCB. I had one trace lift on me, so I had to solder on a bit of wire to rebuild the circuit.
I did the buttons in red, and the indicators in blue. (Damn, but they're BRIGHT in the dark with the lights off.) I also tried to do the temp indicator in red, but I didn't remove the initial filter on the numbers themselves, so it're really dim. Green filter + red filter = very dim. I can fix that quickly enough though.
Next step will be to change the dahsboard colour.