Steve, Those we have seen and done on the rear seat post we put a threaded stem bolt or all thread into a metal plate and U bolt (muffler clamp) to the rear seat post. We have not got an image on those and never thought to get one. Though the folks in house have done that in the past to hold a propeller. They also have used the rear lid as a hold and mounted a plate to the underside and stem bolted the propeller under the rear deck lid. BCB
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