You've got a 22 year career ahead of you fella, whats a couple of months? If CMT is the trade for you then wait till they give you a place. I doubt it will be till then and more likely the AFCO are trying to up their quota on another arm or service.
You hit the nail on the head, spend a couple of months doing phys, a bit of research etc and you'l find trg. a whole lot easier. Besides, who wants to start trg. with a new year hangover?
I passed my selection and got a phone call within 2 weeks telling me there was a space, mind that was 14 years ago, there may be a place that comes up quicker than you have been told due to unforeseen circumstances so stick with it.