Parts interchangeablility?

One of my spare units is a MK2 (No printing on the back of the case). The rotary knob is difficult to work. I was wondering if it is ok to take a display board (with the knob and all) and just swap it out with a mk2A one? I still have the peices of the MK2 that has the shot main board, and the display/control board should still be good. It would just be a matter of a couple of connectors carefully swapped out?
Any info really apprecated!
dww

Yes. Check this thread for more info, particularly this post.

Just make ABSOLUTELY SURE that you don't plug in the display board cable off-by-one-pin or else you will BLOW FUSES and maybe other bad things.

Triple and quadruple check and make really really really sure.