I've chiposen the mgl iefis lite for my -4. I have 2 of their other gauges in my current airplane and they work perfectly. I want to buy an ACK 406 ELT. It can transmit gps coordinates to the rescue folks but it needs the data fed to it in either benix/king, garmin or NEMA formats. I have not been able to find any mention of one of these outputs being available from the mgl iEfis Lite unit. Does anyone know if it can be done, or better yet, is anyone doing it?