What are your guys opinions on Scag's mulch master kit? My dealer told me it was not worth it because one guy spent the money and had it put on and the blades were scraping the sides so he had to cut some slits so that the blades could turn without scraping. I think this could have been poor installation though. Anyway, how much grass in inches approximately can a mulching kit cut off before clumping? $150 is not that much money and i could easily afford it but I'm just wondering if it is worth the risk of screwing up my mower. But if they do mess up, that could mean I might get a new mower.