The front of my 21' FW rides a bit high. I've adjusted the hitch as much as I can and can raise the pin box by 2" but haven't. Have 7-8" clearance at the bedrails as it stands. Is it worth the ha...
Hard to say what a little high is, maybe just the 2" I can adjust it. Suppose next time I have it hooked up I can find a level spot, which is easier said then done, and take a 4' level to it while hooked up.
I like the CAT scale method, don't know how much a couple inch change would make but it'd be interesting to find out.