precise miter boxes, for hand saws

There are plenty of plastic miter boxes, of course, but I'm more interested in very precise ones.

• metal versions of the plastic miter boxes
  • several by ZonaTool.net [amazon] (the thin-kerf version is ⅞" high, 2" inside width, and 6½" long; kerf is 0.14")
  • by Excel Blades [amazon] (kerf is designed for a Japanese saw; 1.18" high, 1.59" inside width, and 5.25" long)
    • miter box only
  • by Firstinfo, the 9.8" long version that includes a clamp [amazon] (2.5" high, 3.4" inside width, and 9.8" long; kerf is 1.2mm / 0.04")
  • by Firstinfo, the 5.5" long version [amazon] (0.79" high, 1.57" inside width, 5.5" long)
  • sold by Hobby Lobby (it looks very similar to the Firstinfo one) (1¼" high, 1⅞" inside width, 5⅜" long)
  • by Crain Tools
• the Dobson Miter-Rite (made from plastic, but it's beefy and designed for a Japanese saw; ⅝" inside height, 2" inside width)
• by Craftsman
• by Lee Valley
• by Jorgensen
• by Wolfcraft
• and there are numerous vintage miter boxes
  • the Stanley H114 Miter Box looks neat!
  • guide to buying these
• instructions for building your own
  • by Paul Sellers
  • by Eric Sorensen
  • some miter boxes include a 22.5° as well, and a digital angle gauge might be useful for cutting that?
• at the VERY high-end is the Bridge City Tools Jointmaker Pro [video 1] [video 2]