"Necessity is the mother of invention".   I really like these kind of things.   We have a "Mantis" roto tiller, for small gardens, flower beds, etc...it works great.  We got a thatcher tine option when we bought it, it work well except, if anyone knows anything about a Mantis tiller, it works differently, you have to pull it.  We made a hitch setup on the Mantis so we could pull it behind our riding lawn mower to thatch the yard.  It works really great, saves the lower back.  I'll have to post a pic.

Yolanda