Listen, Jimmy, its your career, and it sounds like you have it all worked out. The Engineers is a great job. I would not trade the 9 years I spent with my brothers for anything. I just think that if you are already bored in your trade, then a remuster to a "zero" trade ( no disrepect, that's a nickname for combat arms, the MOC started with zero) will not help. The challenge you are looking for is available to you in your trade. A signaller in an infantry company or any other combat arms hq should provide you with lots of opportunities to get fit, shoot guns, dig trenches etc. Or you can go JTF. If your file shows you bouncing around lost, you are doomed. Having said that, if you spend a few years in your trade then still find it wanting, do something else. I have remustered 4 times in my 18 year career, and always to something better than the previous tradde. I have had a fantastic career to date, with tremendous opportunity, but I have constantly sought challenge. Good luck, and msg me if you want more info.
Take care, warriors