So I really don't want to do Garmin and I really like the fact that I can do ADSB in on my phone with a $100 Strautx thing( I think technology should be cheap). So Aspen needs a GPS source right? Why could I not have say a Freeflight Ranger system with WAAS as the source? Looks like it should be ARINC 429. I sent an email to Freeflight to see what they have for ARINC 429 output. No one really makes this easy to understand.