WOW! That is an awesome manual! I would do next to anything to have one for mine. That boat certainly is gem too and then when you take age into account, the phrase "one of a kind" certainly comes to mind. I need to get some pictures of mine onto my computer so I can post them, because I've always been impressed by its overall condition for being a 76'. I also have a 85' avon 4m searider that I'm restoring and the difference is night and day in the condition of the hypalon between the two and the avon is in decent shape (definitely seaworthy). What a difference storing in a cool place out of the elements can make (as if that wasn't obvious to everyone) I'm no expert, but I have spent COUNTLESS nights staring at my computer researching these older (and newer) zodiacs. Yet, I had no idea they were putting aluminum floors in them even in the 70's. Granted when I search the catacombs of the www, I generally look for the wooden floor for comparison. Speaking of which, I'm starting to think I might own a unicorn, because I can never find even a whisper of a 76' mark IV GR aside. I did see an article in a popular science magazine though that had the available models and and general specs of each and low and behold there was my mk IV except it was a 77'. Did you acquire that manual after you purchased the boat or were you lucky enough to have it come with it? If you did buy it after, where were you able to find it?