I think the "4" drop" method is way too crude for estimating hitch weight.Not sure if I could load my BX2230 far enough forward to get 4 inches of drop on the hitch/bumper. I don't think I could with my B26TLB either unless the hoe was over the tongue towards the back of the truck. I am using a 2007 Toyota and a 16ft, 10k, landscape trailer. I did use a tongue scale to setup the BX2230 on that set up, don't remember if I checked the B26TLB, though. 4" drop on the bumper would have trailer tongue jack dragging. Just my situation. Jon