I don't have first hand experience with DX6-G2 or telemetry, but a club member demoed the DX6G2, T-1000 and Vario just a few weeks ago. I am not sure which Rx he used, but I suspect it was AR610. The AR610 requires the T-1000 to enable telemetry. The Vario seemed very sensitive and recorded max height reached. Spektrum has receivers that have telemetry built in such that the T-1000 is not required.