I’ve got a 2006 294 ProXL and the rear seat post will not come out. I recently bought the boat and am going thru it front to back. Are both front and rear posts threaded. And if so, any clues on how to free it up. I’ve gone the WD 40 route and the post will turn with a pipe wrench. Pretty sure it’s threaded as the front is (it’s fine). Clues? Ideas? All help greatly appreciated.