Not directly related, but a mate in the RAF has transferred from SSC tp PC. In the conversion, they forced him to change from old to new pension arrangements. Find out what you want and get it in writing. He is going to have to go through the redress and MP palava (sp?) to try and sort it out - the change also meant he lost some of his time served to qualify.
Many of the FCs that come to the RAF on exchange stay or transfer at a later date. I would reiterate that it doesn't seem to be a major hurdle, though it may of course be a bit different if you fly.
STH