Do the Helix models network and accept the Lakemaster and Navionics cards? I haven't actually seen one but there doesn't appear to be a door on the front for cards like on the core models.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner