this was given to me by Ken Yap.......With a 7/16 quality metal drill bit you can create more space in cabin.....slide table to top and mark pilot hole on aft side of mast support (be sure table is straight before marking)......be sure to leave room above table to permit daylight to come in thru windows / hatches (about 4 inches or enough room to place a cabin cushion)....put table back down....apply masking tape over mark....be sure drill is level and begin...once thru aft side....ensure drill is level and straight before starting to drill thru to forward side.....file edges if needed and you are done....takes about 15 total minutes