Powerbox and Rsat2

Hi

I have the Avanti Jet with Vector and I need 16 channels.

I have the Powerbox Cockpit SRS and 2 Rsat 2 Reciver.
I use the EXT output on both Reciver so i can run EX and the 16 channels

I would like to use " the fuel flow senser" as telemetri but i don´t have the input - it is taken...!!

Can i use the

DUPLEX EX E4 EXPANDER 4 TELEMETRIEMODULE ??

So i can run the EXT and the telemetri??

Regards
Henrik - Denmark