I am currently waiting for my phase 1 date, to join the Army as a CMT. However, as a re-enlister, I was only given one job choice before I went to selection, and after a long debate with myself, I chose CMT over the Signals. My question is - is it possible to change my one and only choice, back to the Signals before I start phase 1. Or is this now set in stone, due to my re-enlisting status? If so, then how successful are applications to transfer into a new trade, after 5,6,7.. years of serving?