I've sold my Motor Guide trolling motor and I'm getting a Minnkota Terrova this week. My old tm has a 45" shaft so do I need to go to the 60'' shaft for the terrova or stay with the 45" shaft. I have a 19' Stratos and the 45" shaft on my old TM pulls my boat fine. What do ya'll think? Please keep your head out of the gutter on this thread!