To answer the question about the bulge, it occurs at the rear center of the top. It basically looks like the top has a slight bow to it, either from not being molded right to maybe just the way people store them. Enough of a problem for Lotus to make a fix for it. The top won't come flying off or anything, it just sometimes makes a whistling noise at higher speeds and just lets in a lot of road noise at lower speeds. The fun part comes with drilling the holes in the hardtop for installation.
A Dirge for Her the Doulby Dead in that She Died So Young