I have a question about mulching kits. Currently I mow at 3 1/4" on moist of my lawns. my question is., how much can a mulching kit cut off, before it starts to clog the deck and large clippings start showing up again? I would think it could shred at least 3" of clippings right? This would be for my 1996 Scag 52" SWZ w/b.