Since I own a Mantis Tiller and a similar Honda FG110AT that also use the same type of de-thatcher attachment . . . http://mantis.com/store/viewitem.asp?idProduct=906 I was wondering if anybody here has used either one of these? Is it worth having for your own yard? Any remote chance of being worth having for commercial use? Also has anyone here used the straight cut aerator tines on the Mantis? The instructions for them say to use them in a N/ South & E/ West pattern?