Knobs & switches

The black/silver knobs are just as I hoped. Switches are nice and chunky although require a fairly large 1/2 inch hole to mount but good nonetheless.

Cardboard template is 4U which I made when trying to determine the best size for the project. 6U is much better.

I decided to avoid trying to replicate the on-screen look of the Fabfilter One too closely as this adds unnecessary complication. Controls are laid out neatly and in the same relative positions to the source but spaced for ergonimics.