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 ...
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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