HELIX MEGA SI units and HELIX MEGA DI units have the same DI technology ...
HELIX MEGA SI would give you an extra tool (MEGA SI) at the front ...
-----
HB Bow 360 is about $500 cheaper than the transom 360 because transom 360 has a deploy system ... Both perform similar ...
There are after market mounts for HB Bow 360 on electric steer trolling motors ...
Cornfieldcrappiegear has many models ...
Rickie