I think mine was in Akihabara last year for some (dirt cheap) second hand Switch games, but besides that I have no idea where or when.

Using a SATA cage is a really interesting suggestion, since it can likely be used to expand the capabilities of the HM90.

The Rosewill cage will be difficult to source in Europe, but I think that putting some swappable bays into an internal drive enclosure should fit with a printed adapter into the 10" rack.

I’ll do some more digging on this direction. Thank you for the suggestion!

The thing with XHTML is that even a minor problem will make the page refuse to render and display a full page error message instead of any content. Having the browser guess how to handle the malformed HTML isn’t ideal, but it’s a lot better than showing nothing at all.