My E27 was like that when I bought it. Honestly I wouldn't have it any other way. The *only* down-side (if it can be called one) is that when you have company with you in the cockpit, it can be a bit crowded playing musical chairs while you crank the lines. Mine run right back along the top of the cabin roof.
I think there is a document that explains the locations in this forum's Documents archive. All you really need is to identify the proper mounting points, mount the winches with an appropriate support pad, and find yourself some pulleys.
I have single cheek blocks for every line, and if I were to do it over (and maybe I will!) I would buy one of the multiple-station cheek-block organizers - sorry, I can't think of their proper term. That gives you one set of holes to drill, and some room to grow if you get one large enough. Ditto for the cleats - if you get one of the multi-station cleats, you have a much more organized setup.
HTH,
- Jerry