I just bought a 240 sd. It has the optional seating package in it. The cushion right behind the port chair blew out while driving on the highway (before I purchased the boat). I was looking at how to lock it in place but cant seem to find out how this is done . Does anyone have a 2003 240sd that can send me a picture of how theirs is installed, or can someone just tell me how it is supposed to be installed. I don't want to get the cushion repaired until this problem is fixed. Thank you