JRM,
I see from your similar thread in Mil Aircrew that you're considering going back into the RAF in a ground branch. What's more important to you, having a commission or flying?? If it's the latter then why not push for aircrew only at OASC again? When I did selection I told the board that I would go pilot or bust, wouldn't have considered nav, never mind a ground branch. It worked, but recruitment at the time was a lot healthier (late 80's).
How long ago was it that you left Cranditz? The powers that be seem to want you to do OASC again, have you tried pushing to get straight back to IOT in your original branch choice without doing selection a second time? They're going to want lots of assurances that you're not going to VW again, though.
Good luck anyway!
ST