Just thought I'd post my build to share with you guys incase anyone was considering it.
Ranger 521L.
Rear; Atlas hyd plate, Power pole blades with pumps mounted behind splashwell, BassBoatTech 3 battery tray for port side, dual cranking battery wired parallel on STBD side, standard dual pro charger and standard ranger battery switch.
Dash; dual set up with a Lowrance HDS12 Live left running active 3-1 transducer bottom of step with a shoot-thru glued in the hull for on-plane reading, also on the dash is a Solix 12G2 MSI+ right with the transducer on the back under jackplate. See photos for transducer mounting, zero interference. These are mounted on a BassBoatTech dual mega bracket.
Bow; garmin 122SV on top hooked to livescope (box mounted to rod tubes under front bow panel), Lowrance HDS12 live bottom lefthooked to HDI transducer on bottom of Ultrex with a transducer shield and saver. Solix 12G2 MDI+ bottom right will be hooked to fortrex Mega360 whenever it comes in. Van @ BassBoatTech helped with the building of this triple bracket. Hydrowave mounted on a modified Bracket from BassBoatTech. So far no interference with any of it.
Accessories; Point-1 mounted under rear lid battery compartment, Sonic-Hub, Fuel-Flow sensor, NMEA networked to all 5 units (use of heading from point-1), Lowrance Ethernet between units, Humminbird networked between units. All locators mounted on gimble brackets from BassBoatTech.
Wiring; Ran 4ga tinned marine wire from the battery to under drivers dash, this runs to a 12 fuse BlueSea fuse bar under dash. Ran 12ga marine tinned wire from there to bow for(3 MFD's and livescope) ran 16ga marine tinned for hydrowave, ran 14ga marine tinned for ethernet hub and for mega 360, console power locator direct to bluesea.