I have a costomer...old annoying person. She needs a portion of her yard reseeded....she accidently killed it with round up. nutso. Anyways, her ground is hard as hard comes. Now obviously i won't be able to do anything till the spring...but how would you go about breaking up this rock hard clay? Tiller? Lanscapeing rake? Mini-disk or cultivator? I have a tractor with a 3pt hitch/ rear PTO, and a local place that rents implements. Thanks a ton! Happy holidays!