It's odd how it's possible (almost easy) to beat LZMA on small (<10k) files. The comparatively large adaptive model (~2k variables) does take a while to warm up.
After reading the write up of the mind-blowing 1541 floppy drive demo "Freespin" by @MatthiasKramm, I noticed that the Renoise instruments used during development were available for download, so of course I had to make something with it, enjoy :^)
SFO terminal naming is alphanumeric. The short names are "I", "1", "2" and "3". Apparently, nobody saw any problems with that. The information guy in terminal "1" says that, every single day, he redirects 50 people who needed to go to "I" but ended up at "1".