It rarely makes financial sense to build just one or a few of something, because it's likely that nearly the same amount of billable hours will be required whether you're building one or a one hundred units, and because some of the necessary parts and materials may require that you order 100 or 1000pcs or otherwise carry a prohibitive price tag if you order only one.
...But a custom project can occasionally make sense and be a lot of fun when it does. A few examples are shown here.
RETROFITTING, REPLACEMENTS, UPGRADES, ADD-ONS
Quantity, quality, and budget permitting we can employ our design and manufacturing skills to create (or recreate) replacements, add-ons, upgrades, “mods”, or whatever else you want to call them for existing analog mixing consoles or comparable collections of like-gear. Examples of past projects are detailed below.