How about a Jetibox Profi as a standalone ground telemetry unit and add an ECU interface module, Jeti Rx and perhaps a turbine MFlow sensor?
Then you have full Jeti telemetry and still keep your Futaba.
FWIW, I bought one of the first DC-16 and will buy the DC-24 sometime in Dec when it's released.
Jeti has had a pretty good record of performance and reliability IMHO.