I guess my thinking would be, if running stauns, why run a clamp style outer beadlock. Id just put rock rings on the wheel.
Grinding doesnt fill any of the weld. So if the weld has a hole, its got one either way. I know either way works fine, but I feel that the weld bead actually helps to hold/center the tire on the flange. Either way, I always put a sealer under the tire bead and along the inside of the weld flange to help with leaks.
