Got the Mc gard prop lock for the Pro xs today…part number 74039…expensive keyed lock nut at $55…replaces existing nut and outer washer…called Mc gard and was told each nut comes individually keyed…got good info since the lock comes with a registration card and key #…put it on and seems like a perfect fit…unless someone from Mc gard comes down and follows me to the motel with a copy key, should rest easy on the prop theft issue…now I need to buy a couple of guard dogs and teach them to love the Cat as much as I do so they dont mind sleepin in her when at the lake.