[QUOTE]technical skills as close to aircraft as you can/QUOTE]
Irrelevant. If you intend to go WSOp ASAP, extended trade training would add little at the Interview phase at OASC Board; moreover, getting out and doing an airman's job - including MT driver if that's what you want - (rather than getting too bogged down in Phase 2 trg) is more likely to enhance your chances in the OASC Exercise Phase.
[QUOTE]and with opportunity to improve aptitude potential./QUOTE
You either have aptitude or not. Mostly... it's the way you're wired. Very few make significant changes year on year.
RAF Taff. If you have any further selection related questions, lets get onto the OASC thread to save repetition and aid others with similar thoughts.