I found a great deal on a SkyRadar L model ADS-B receiver so I could have weather on my 720. This was the previous L model with the aluminum box and external GPS and antenna, not the current L with GPS and antenna internal. The wi-fi setup with the 720 was quick and easy and everything seems to work fine.
I'm planning to eventually remote-mount the SkyRadar (hate boxes on the glareshield!), so in planning this, it then occurred to me ... When the 720 is communicating with the SkyRadar, which GPS does it use? A quick call to AP support confirmed that the 720 continues to use its internal GPS and not the SkyRadar's. That's great for a remotely mounted SkyRadar as there will be no need to use the external GPS, route the cable, mount the puck, etc.
By the way, if anyone else is contemplating remotely mounting their SkyRadar, the threaded 12VDC connector is Digikey #SC240-ND in case you want to make-up a pigtail and not have to sacrifice the 12VDC accessory plug and cord that comes with the unit (just in case you want to go back to a portable situation in the future.)
Just thought I'd post this FWIW ... and also compliment AP for excellent support!
John
N750A