Hi Craig,
My only experience with an F-14 was an old DCU kit that I converted to turbine around 8 years ago. It was around 1/10 scale and on the heavy side after conversion. It was difficult to set up a fuel system for more than 5 minutes of flight. There were no significant CG shifts, but some retrim was required. A pitch axis gyro might be beneficial if you are worried about too much shifting. The ACT gyro will pass a taileron mix and work only on the pitch axis. I suspect however that you won't really need it.
Regards
Mike