Here is the seat in the boat, It the seat on the right:
Here you can see just the post with the seat removed:
Here is the best I have with out the seat, it only sticks up about 1/8, to 3/16 and never causes a problem for me.
You can add as many as these were ever you want to move the seats all over the boat or you can remove them all toghter.
Works for me.