Anyone know the difference in weight between the 45" 80# 24V Terrova, Ulterra and Ultrex? If not where can I find these numbers at? Currently running a 54" Minn Kota Fotrex 24 volt 80# thrust and its way to big and heavy for my boat. Trying to lose as much weight as I can on my XB-2003 and this will have an impact which one I buy. Thanks.