Replywood is a 6 weight monospaced font. (Normal + alternate and thin, regular + bold.)
The thin weight is half as thick as the regular, which is half as thick as the bold, this allows you combine the weight at various sizes (doubles or halves) while maintaining a single stroke-width.
I've worked on this on and off (mostly off) since 2001 when travelling. Replywood is inspired by everything from Italian churches to Edward Johnston.