Glad I saved the box. It is working with just the two center bolts but I would like one that bolts up easily and I could use all four bolts without needing to drill. Drilling new holes would be one thing but these would be elongated type holes. Does yours cover the entire discharge opening? Mine has a pretty good gap at the rear where the mulch kit flares out. In the dry areas it blows crap out but in the junk and high moisture weeds it clogs up and quites blowing out. I wonder if the jig was set up wrong on some of them.