Hi I'm looking at the jd lawn roller or something similar. I have about an acre of my yard that the orginal owner never did much with and it is full of humps and bumps. I brought in some black dirt and had the big ones filled in but there are tuns of small to medium humps/bumps all over. I live in northern MN and I think there frost humps and prob. some old gopher mounds. Has anyone had any luck with a lawn roller and these kinds of conditions? I'm thinking a 36" or 48" roller. Thank you and sorry to the mods if I should not ask this here.