[SamReidHughes]

The site's down, and you raise a valid point. But:

Even starting from an ETA, there are improvements and variants that can be made. (For example, some Chinese clones of the 7750 added a safety mechanism to the date's quick adjust mechanism. It's a really simple and elegant design change, too.) The open source aspect of this project isn't just that there's a movement, but that there's a development process. Or that's what they say, anyway!

Also, pretty much every non-ETA/Sellita movement in the cheaper-than-Rolex market is just about marketing. The movement offers nothing of interest to buyers if it's just some tweaked CAD files of a 2892, because those buyers would just get an SW-300, which is the same thing [1] with better reliability.

[1] Or not the same thing; there are probably differences just like with the SW-200, but everybody in the market will think that way.