TIA,
Interesting idea to have Dual Band Receiver w/ AHRS, nice for those will ADS-B Out already, or waiting to get ADS-B Out. Glad to hear the new DX is working with our software without issue for WX and Traffic. iLevil has introduced the iLevil Sport, only it's a super portable GPS + AHRS, no ADS-B. The GPS, AHRS and ADS-B market is getting interesting and very diverse.
With the SkyRadar AHRS, we'll need to get a test device from SkyRadar to code up and test the AHRS from the DX. We will reach out to them after SnF. Development time will be TBD at this point.
As for using your internal Nexus 7 GPS, just leave the SkyRadar DX Antenna out of the mix and the App should sense the absence of the GPS Signal and revert to using the Nexus internal GPS signal. I hope this helps.