I need to get a trolling motor for my pontoon. I have a 20 foot G3 with a 70HP Evinrude. Grizzly has 2 bow mounts hand control. One is 55 Lbs. thrust 12 volt and the other is 70Lbs. thrust 24 volt. Would it benifit me that much to change over to 24 volt and go with the 70 or do you think I'd be satisfied with the 55 Lbs.?? Thanks, Ferdi aka Fred