Quick tip to save you a few clams...
Everyone says these are unrepeatable - well... send me all you have, I can use them :-)
OK, after you remove the RF unit from the board, have a look at the inside - not much to it. Certainly no magic -
Have a look where the perfboard joins the case... see the solder pads and joints? Remove as much solder from the 2 joints on the side as you can, and then use desoldering braid for the rest - after that, just pull the board out.. like so -
Nice, shiny and new. Button it back up and reinstall.