-- Last Updated: Jan-16-13 9:30 PM EST --
I have never seen them either, but I like the idea of having a removable pin to keep them upright or laying flat. I have Thule Hullavator pros and I think the weakest link in their system is the lock on the swivel. At full price they list they do seem a little cheap for stainless steel tube.
Foam is easily replaced by closed cell pipe insulation and covered with dragon skin.
Somebody has to be the guinea pig..............
Deck Rigging Gear
PFD's (Life Jackets)