Date registered: Sep 2004
Vehicle: 2014 E250 Bluetec 4-Matic, 1983 240D 4-Speed
Mentioned: 3 Post(s)
Quoted: 256 Post(s)
I think clamping to the lowest structural members of the cart is likely the best option. Are any of the structural items square or round tubes? You might consider filling them with lead shot. Drill a hole, pour the stuff in and then plug the hole with a bolt. The lower the better and if you have time, you can try shifting the distribution of weight from side to side for different courses.
If you want to lock it in to specific areas, you can try drilling a hole at one "stop" point, and squirting in some of that expanding foam insulation, then drilling another hole at the other "stop", pouring the stuff in and lifting the tube so the shot runs down to the foam, and when it is all in, you squirt some more foam in to make the other stop. Shot is trapped and if you want to take some out, drill a hole and pour it out, then seal it with a bolt.