Your blade part numbers are correct. I know cub cadet blades are expensive, but it is my opinion that they last FAR longer than the aftermarket ones. I don't know that I have ever seen cub brand blades to hit, however, I have seen other brands that will. As long as you get the correct ones for your machine, I don't see that you will have any problems, unless, your deck is bad. In the pics, it looks fine, I might add. If you get off brands and they hit, I'd say just "trim" them a bit. Also, if the dividers around the blades are worn out/ bent, it will leave a strip of grass, might check that out too. The only deck that is "timed" to my knowledge is the one from an Original Cub Cadet.
