I fear the point is being missed. Forget List 1 and List 2 trades, simply make LAC = AC, SAC/JNR TECH = LCPL, CHF TECH = FS, FS = WO2, WO = WO1 and Bob's your uncle. Rank progression for all trades would then be: AC, LCPL, CPL, SGT, FS, WO2, WO1. All it would cost is a few quid for (blue) cloth rank badges. The other aspects of pay and establishments have already been covered.
BTW, I agree entirely about the RAF Stable Belts - should be on issue for wear by all RAF personnel in CS95. It doesn't seem to bother the Army a jot about not wearing them in the field, we should do likewise with an edict from on high (oops just saw a pink elephant)!
Whatever your view on the RAF becoming simply a Corps of the Army, do not speak in jest - it may just happen and sooner than you think. Regrettably, we have not learned the lessons of the Canadians, who had to undo it after 2 years when it was evident it did not work. But, the steamroller is moving.