I swapped mine out on the trailer. I just lifted the boat high enough to clear. I used carriage bolts. I counter sunk the smooth top so it won't scratch the boat and counter sunk a nut on the bottom. Then I bolted the bunks to the trailer with a couple washers and a nylock nut. The bunks will never strip a bolt and float away. If you need, you are welcome to use my upholstery stapler and stainless staples. I have plenty.
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