Since of course you also have a full year of leave just plonked into your lap you could ask CO for permission to work in spare time which I think is hidden in an AP somewhere.
In QRs if I recall correctly (like 12 years ago so don't quote me) but this is EXACTLY what I did and the joy of it is it trumps everything. I've put this up before (because the question has been asked before) but this is fact so it is what can be achieved assuming the regs have not changed.
Finished work on a flying Sqn Nov 2002.
Started new job Nov 2002 (and got paid from the get go)
Officially left RAF May 2003 (and got paid until I left)
got the NI back out the blue 3 years later without applying luvverley jubbly
I had all of the following well on side: Staish, OC Admin (ma'am - I fancied the pants off you
), my boss and most of all WO PSF. Get the right people on side, this is all sooooooo much easier.