I am getting ready to order my dream setup for my new Ranger RT188. I am going to run two Helix 10's on a BBT dual mount on the dash. One will be a sonar/GPS for running Lakemaster plus map. The other will be a SI/GPS version for SI and DI. Then I will have a Helix 12 Chirp/GPS on a 2" BBT mount on the bow. The 12 will be hooked to a 360 mounted on my Fortrex. My only issue is trying to figure out what I need for Ethernet cables, 5 port hub, adapters/dongles. Never ran more than two units before. My 1159DI and 1199SI was pretty easy setup. Anyone have a educated guess on how many Ethernet cables and what lengths I will need? Any other items I need to make these all "talk"/"share" with each other?