Some of the best efforts here are the clones. They come with drawings and specs, right down to the paint color mix, not to mention construction techniques.
BUT, many of the departures have equal standing in my recollection: Pangea's MTM's and the interactive design process getting there, sebackman's HT ensemble, the super cool Sub 1500 packages. Everybody's got their favorites, no doubt.
L200's deserve their own forum, probably. 4430's and 434x's certainly do. Or, more generally, maybe, it's two-way, three-way, four-way? DIY crossovers need their own place, as well.
Then there's the "How To's," some of the most useful information here: Refoaming, grille replacement, diaphragms, refinishing, room treatment, testing....
I, too, am thinking about approaches to structure. Too hard to find this good stuff among 6000 threads and 50,000+ posts, and there's more coming all the time. Lotsa talent here....