We have owned our 1984 E30+ for 17 years. I have seen and been aboard many models of these wonderful boats, but have not seen a 26. If you look across the top of this site, you will see the Resources section, which does have some documents specific to the 26, though I didn't see a manual. Many systems on these boats are common to most models, so asking questions on this site may result in good advice from the many knowledgeable owners here, some of whom are professional mechanics, riggers, electricians, etc.
Also, most of us have found that it takes about a year or so to really get to know your boat--poking around the lockers and engine room, seacocks, various pumps, electrical system, etc. Also, if you are in a marina or yacht club, other sailors can often offer good advice, though as always it's good to get a few opinions before embarking on a major project or hiring a professional when needed.
Your boat looks lovely in the pics!
Frank