i am going in on the electrical and comms side instead of the aerosystems
Well you might
want to go comms and you can express a preference, but that isn't your choice - where you end up will depend on how you get streamed during your doughnut and spanners course.
And be careful what you ask for, or you'll end up on comms, but looking after a defunct bunker in the middle of nowhere as OC Buchan ..... then again
