In reply to:

... a font that has standard letter "widths"? I forget the technical term for this..

Monospaced (or character-cell) fonts

(Actually, character-cell fonts have stricter requirements, but they are monospaced, and I want to keep this simple!)
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Toby Speight
030103016 (80GB Mk2a, blue)
030102806 (0GB Mk2a, blue)