I changed the blade in my rotary cutter, as well, but the problem is that the guard on it is now inoperative -- I've got to look at it closely -- I may not have put it together right. It cuts very well, but without the guard, it's very dangerous, and I've had more than one collision with a rotary cutter. It's great to be back online again -- we've been out of internet service for a week + - that's awful!