My Cal 28 has Signet instruments (speed, depth, apparent wind) and an AutoHelm ST4000+. I am considering replacing all the electorics on board with a Raymarine C80/GPS/Radar/ST60 instrumentation. From what I can dig up in the way of information, I believe that this can all be combined into a single display, including the instrumentation output. However, the available Raymarine documentation doesn't seem to show much about adding in the instrumentation. Can anyone tell me if this can lead to an effective and usable combination of data? Will this allow me to see the actual instrument data on the C80 display? Is there any competitive line that will effectively combine all this stuff into a unified whole? I hate to go with the only apparent choice if there's competition to check out.-Smitty