I read some posts about Spektrum compatibility. At this time I fly very happy with the Mercury, TM 1000 and DX18.
I like very much both powerbox products and Spektrum too.
This post is just because I hope Powerbox will continue to support spektrum products.
I know as an example, that the TM1000 telemetry trasmitter is dicontinued.
Please evaluate the SRXL2 protocol support, even with an adapter cable instead of a dedicated special connector.