EDIT: My apologies, I think I was in a bad mood when I wrote that post.
Doesn't make you wrong.
I believe slowmover's point would be that from 4000lb up there's no additional benefit. The sweet spot, as they say.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer