I had a gap of about 2 months when I PVRd with all leave/resettlement taken into account - My Sqn CO said there was very little he could do, I pointed out that I could "come out" and be gone today !!! (It was meant as light hearted comment as I was living with the future Mrs WM at the time)
I got 8 weeks "gardening leave"
Ask yourself (and your boss) will the service grind to a halt and nations crumble if you left a few months early?
good luck - be nice, but up to a point, you've given a lot you should expect a little in return
rgds
WM