Good idea. I didn't think of a stone guard. Should be easy enough to make one to put on and take off as needed. Before I place a front wheel chock, I will be doing some weight testing on the tongue weight to see exactly where to put it. Thanks to all for mentioning that. I've found a site that the author has described a method for using a bathroom scale to figure the weight distribution. Pretty interesting, but I will test it out before trusting the method. But then again, if it's on the internet it must be true----right?