I have a 1998 700 lx with a motor guide mounted on the bow. The trolling motor is not late model. It has a low and high range with separate switches on the foot pedal. It has a lot of torque. It is mounted by the trolling motor base sitting on 4 rubber anchors with 1/4 inch bolts. The bolts will work up and down or even bend it the anchors or anchor pads will pull apart. This has happened over and over. I’m constantly retighten the bolts even out on the water. I need a solid anchor. What can I do to stabilize the trolling motor?