We all know that the old standbys have been around because they just tend to work... at least well enough. Some got there by being well designed for a specific application and I'll bet many were more luck than skill on the maker's part.
I've been extremely happy with many of the group buy runs on this site. That being said, sometimes the best plans on paper don't work out as we had envisioned. What are some custom boolit designs and group buys that just didn't live up to the hype?