How well does the 21" mower deal with sweet gum balls?
My 21" non-SP model tends to shoot them out from under the mower. It will pick some of them up, but not all. I mow at setting #2 so maybe that's why. I also don't have the HL blade so that's probably another reason. I generally use the collection bag and do see some in the bag after mowing but probably more are getting shot out or not picked up at all.