I'm shooting some 300yd F Class matches in Manatee Fl, I can not for the life of me figure out how to get my front rest stable on this ground. The feet sit on uneven pieces of sod, the sod sits on basically beach sand. 2" spikes do nothing. Cone feet just bounce off the sod grass like a trampoline. I think the only fix for this would be to remove the sod and replace it with only dirt or small rocks. Any ideas ???