[f5soh]

Looks like some (clones) RFM22 modules have some issues with frequency calibration.

Setting a high baudrate allow a wider bandwidth and automatic frequency tuning between modules.
If you revert to 57600bauds can you confirm the link do not work ?

[hwh]

...Now need to tackle GPS, seems to overwrite back to nema once plugged in after changing to UBLOX in mustation...

The revo startup resets the gps and then configures it to the way it wants. No configuration should be needed, only the cc3d requires the gps to be manually configured.  Is the gps not working with the revo?