I never use a trolling motor, but looking to add one to the transom for very minimal use. I have an Engle dry box modified so the TM will be portable/sealed with fuse, battery, connections etc......I have a powder coated aluminum mount that clamps to my Poling Platform which looks like a Gheenoe bow mount. TM will have a tiller extension. We have NO Wake Zones starting from 1000' of the shoreline in the IRL. Instead of shutting down the motor and Poling for EVER I'm wanting to deploy a TM and run it until Poling. Would like to buy the least expensive Riptide(45lbs) or even a $100 30lb. Endura C2 May do, but I think the 30" shaft will be too short. *Does anyone have a formula for calculating how fast the TM will push a Skiff based on Skiff weight and TM thrust? *I have no current or tides to deal with and wind should not be a problem for my intended purpose.