Potentially, but is it realistic? No. And once again Techies dip out as we (in my case) had JT rank to deal with and will have CT before I get a sniff of 55. As a Sgt who's done 20 years, 5 1/2 of them have been in a rank (and training for the trade change) that non-techies don't have. And let's be frank, 4 1/2 years as a JT is not long, many are a lot more than that. It is likely that should I get CT it would take at least 5 years plus before FS is offered, so qround 10 years wasted.
Hit the nail on the head with vernier precision! Techies crap out as usual, did you know that average promotion to FS in TG17 is 22.5 years? That is a pipe dream for us, I made Chf in 1 week short of 22 yrs and that is considered motoring! Not a dig at TG17 BTW, in this case they have it right, Techies are being poorly represented (second class IMO)