OR, if you have a scale on the side of the freeway that is CLOSED< you can go into one of those, and pay nothing to get weighed, yeah you do need to move the setup forward and backwards a few times. BUT< you can find out what you generally weigh empty, loaded per say, with the bars hooked up, and at different links on the bars. I've done this in the past, takes about 20-30 min, but gives me a VERY GOOD way to figure out where I needed the chain links to be to get the best at the end, transfer back of the FA wts etc.
Marty