Hi Gecko,
I have two hewitt 1000# mechanical pwc lifts I have been using for over 10 years. I put them in around the end of May and set them so that the most of the cradle is under water when fully down, this lifts the PWC about a foot over the water when fully up. I have never had a pwc float off. Usually, on a normal year, I have to slide the lifts a foot or two into a little deeper water as the lake level lowers. I know to do this when it starts getting difficult to float the pwc off the cradle.
Cranking the wheels can be a tiresome but not too hard. The key is to make sure the pwc is high enough to not be knocked off by a wave. We are in an area that gets a lot of wave action on weekends and have never had a problem.
I did use to see a neighbor's pwc floating around the cove occasionally, they had the float drive on type, not a lift.
I would not moor my pwc as the aluminum parts will corrode. My PWCs are over 10 years old and still look pretty new, top and bottom, I use the lifts and covers.
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