We own our 9 row nh3 bar and the 4440 kind of plays with it.   We run it right behind the field cultivator so the ground is freshly worked.  I would like to slow down some and maybe even pick up some acres per hour.  The 4440 has 18.4-38 radials in good condition.  I really don't want to add ballast.  We are running nearly 6 mph.   I might just rent one from the coop to try, but if I was confident I would add 2 to ours this winter.  Will she pull 11-30inchers without me worker her to death?