You might have compat. problems with the sounder for the A65 and other series.The DSM ( the little black box thingy that has the green light on it that they sounder wires hook into) is the digital part of the FF unit. I beleive this is unique the the A60 and A65 units. This helped with the price point. I think the higher level systems C, E series use a DSM300 ( $400-$600 just for sounder). The GPS antenna should work. The Raymarine site should have some tech info or call their customer service for the straight dope.