You need to speak to your RCMO and he will get the ball rolling for you application wise if that is what you want. The application details are laid down in AGAIs Vol 2 Chapter 48 and clearly states that no bar on your application and no application is to be withheld except for phase 2 soldiers. If you are accepted then there may be terms and conditions that you will need to accept.
Be aware that REME LAD 8005s could well be subject to some more 're-shaping' to focus upon in-mission effect. Specifically re-balancing A&G trades to second line REME units, how'd you like them apples?