I recommended Hustler to a buddy of mine. He's got a 60" Super Duty with a strip kit on it. The strip kit appears to be the worst design possible as it keeps falling off. He says it has some cam lock like design on the side that is overly complicated, and it's flimsy too. He's wrestled with it several times, each time ending in it falling off while mowing. He commented before he ever used it that he thought it was junk. Last night he backed up right over it. Now he's good and disgusted with the mower and I fear the brand if this continues. Is there a known problem with this strip kit?