Read the jsp instead of trying to get your information from Sqn mates and other sources like the web, it spells it out in black and white ish!! Flying pay has little to do with recognising your potential and your skills and nothing to do with the risk of flying, but is simply a tool for retention, hence why pilots get more than rear enders whilst being exposed to the same risks.
By Pvr'ing the retention incentive has clearly not worked and they take half of it off you, they could I suppose by that reckoning take the lot off you! thankfully they don't.
I can't find anywhere in the Jsp however anything about flying pay when you put in your notice to leave at your option point? anyone have a clue?