I have a 2007 CF29RE Cruiser 5'er I bought it used, the bathroom exhaust lid is cracked and needs to be replaced, I question if the previous owner may have replaced it and if he put the correct lid on it, the lid measures outside edge to outside edge 15 1/4'' x 15 1/4'', measuring the vent opening on top of the roof with the lid raised it measures 13 ''x 13'' outside edge to outside edge, most common lid covers are 14''x 14'' and I wonder if this may be the size I need, any input from anybody that may have replaced theirs?