I guess that's right, isn't it. We learn by doing (and breaking). I've been meaning to get back into DIY anyway, and it looks like I should be able to fix the cage pretty easily. KG was kind enough to give some advice. I'll post updates.
Also, I communicated with a few people about this DAC and it turns out that 1) the designer probably is just retired, not dead; 2) the company that bought Dodson, Silversmith Audio, still upgrades the units, but this one is as close to the 218 version as it can get; and 3) the new DA 218 Palladium version is still being sold--for $8k.
Jeff Silversmith preferred not to share the schematic, but he seems like a pretty nice guy.