re:toerail
HI BudI have a h27 also,!978. I have tightened my toerail with success. It is bedded in a thick bonding tape. You don't need to remove toerail. You will need a deep well 7/16 six point socket,couple extensions and maybe a fine tooth drywall saw. Start from the center of each side and tighten each nut 'till firm ( maybe 5 ft lbs). The ones you can't access is where your saw comes in. You may have to file a slot in the head and have someone hold it to keep it from turning. When I finished I put 2" wide teak molding on the liner flange to cover rough edge and to cover any sawing I had to do. I also Had leaks around all ports. I carefully scraped off all old sealant around exterior, and resealed with a white 100% silicon. This cured all my leaks Good luck red