I've been working with Trevor to get the 480 working with a dual EFIS setup, even including Trevor sending a replacement ARINC-429 adapter. The ARINC portion is still not working, although the EFIS recognizes the ARINC being present and ARINC software 4.0. The 480 is sending GPS data via a serial port and I can draw a direct to line on the screens, but I still get a GPS flag, and no data on the ARINC GPS or VOR tests. I had a professional avionics AI verify the pin outs, and even swapped EFIS units to see if the issue was peculiar to one unit. The 480 is being sent off to make sure it's not defective. Has anybody had any personal experience with the 480? Are there any tricks or deviation from the AFS ARINC 480 diagram needed to get their setup to work? Thanks, Ron