I just bought a Stihl 90 Kombi 4mix unit. I bought the unit brand new with the edger attachment and the power paddle attachment. It was wet out today so I just tried it for about 2 minutes. I had the paddle attachment on and while sweeping the lawn the debris was going backwards instead of forwards. My question is, is there something wrong, or does this unit not have enough power. Maybe I shoulld have bought the bigger unit.