There may be more than one factor causing the cloudy tape joints. I had the same problem building a Tern two summers ago. This summer, I built an Osprey double. No problem on it. Technique was a factor. I used much more epoxy and made sure to float the tape initially, then used the plastic to squeegee most of it out, including all air bubbles, and then I used LOTS of weight (more than the brick they recommend) to hold it while the epoxy set. Another factor may have been the tape itself. A friend of mine got an Osprey kit before I got my Tern's. He didn't get around to building it until this summer. He heard of a possible problem with the tape that Pygmy had been using, but supposedly no longer was. He contacted Pygmy before he started building and they replaced the seam tape without hesitation (don't know if they otherwise acknowledged a problem). My friend had the benefit of learning from my mistakes on technique. With the new tape and careful technique, he tells me he had no problem. He saved himself from having to do what I eventually did--sand down to and through the discolored tape, and then patch in with some strips of regular fiberglass. I got rid of the cloudiness that way, but wouldn't care to have to do it again. (And note: I presaturated the pieces on the Tern with clear coat to make sure I would not get any discoloration from sun or oxidation. So my cloudy joints had to be either technique, tape material, or a combination of the two). Live and learn.