I have a regular trutrak d2vsgv a/p. The current manuals mostly just talk about the special afs version of the a/p. Currently my a/p is not wired to the af3500. Assuming no switch and the a/p is only be wired to the gns430w or the af3500, what are the tradeoffs? Please highlight what works versus what features require the special afs a/p head unit.

Thanks