I have a X530 with a 54" deck. I use a cyclone rake for leaf clean up which works great. The only problem I have is when I use the CR my mower deck "blow" leaves away before I can get on top of them with the deck. I've read that JD makes a kit to eliminate this. Yesterday I was at my JD dealer and picked up a brochure. I saw the anti blow out kit (p/n AM133765) listed for $42 in the brochure. Then I decribed my problem to the salesman and he came back with a price of $111 for the kit. When I got home I looked closer at the brochure and saw that he gave me the price for a mower leaf bagging kit (p/n BM20985) so what's he difference? The description in the brochure is the exact same thing wor for word. "improves mower vacuum performance when using power flow blower"