Does anyone have any experience mulching with a 21" Proline (Kawasaki) with BBC? I am concerned whether or not the extra space taken up under the deck with the BBC and cover assembly (and kickers) will hinder the mulching ability of this mower (as opposed to the same mower without BBC). Also, does anyone have experience with the BBC model using the Atomic blade (mulching or bagging) - good or bad? Thanks!!