I went form reg to TA within the same capbadge but I was too long out and have to start again, However we have a lad who has just joined us 4 months from leaving the regs and has walked in wearing his old rank, but thats life.
The paradox is however, people who join too soon from the regs don't seem to stay more than a year, it seems to be a easing back into civvie street move by some. Also it can be quite frustrating making the change, the TA and the Regular Army are to different beasts, the guys have different ideas and drives to the reg days. Being asked to do things is a novelty rather than being told where to be when and you will be amazed at the whinging many do, but they're not whinging because they are stab wnakers, but because they had there normal life fecked about like arranging time off work only to find a course has been cancelled. To a Reg thats a pain, to a Reservist its a loss of cash, trade and chance to do it another time as it was a pain to clear it from work.
I took 6 years out of it before going back, unfortunatly that was a little too long careerwise but long enough to understand what a strange creature the civvy is, saying that though it is a little liberating to pick and choose your exercises, however don't take the pish, its very easy at the start to be able to swan off and do things you don't feel like, they will soon be on your back if you get the rap of being a bounty hunter.
Good luck whatever you choose to do