I was once running a helix 12 at console and 999 at the trolling motor.they weren't networked. I just got a solix 15 that im going to run on the console along with my 999 strickly for mapping and waypoints.my question is that once I network all three units .

1. Can I use my current high speed transducer that's working on my 999 to work thru it and register on my solix15 unit.

2. Will the solix show a mega image in my 999 via Ethernet network?

3. Will my external gps be able to be used thru the 999 to solix?