Small update. Screw kit fixed the mechanical integrity of the PC. Motherboard was still flopping about a bit so I stuck a few rubber case feet under one corner to stop that.
50mm CPU fan has gone pop thanks to a broken blade. whoopsy. new one won't be here until Thursday.
CPU heatsink has fresh grease. Arctic MX4 seems like a huge waste on a K6-II.
Bodged in a PS/2 mouse port, it's ugly as sin but does the job.
And Interactive Unix 4 won't install onto a CF card.