Lightning2Boy same with me. Medically cleared in August and no word since. Called up a few times to check in and they just mentioned it's been sent to Tamworth.
I've found working on other side projects and having a "Plan B" has been extremely beneficial in taking my mind off the uncertainty. I've been learning bucketloads about myself and developing a crazy work ethic from it. Might even hook into some more study.
All of this will look favourable to the OSB. I'm sure they'll be curious as to what applicants have been doing in the 6 - 12 months since being medically cleared and waiting for a call. If you're not going forward you're stagnating and going backwards. Always aim to improve yourself and the rest will follow
Good luck!