I meant to ask the first time I saw it -- if I'm understanding this correctly, the entire frame consists of parts that can be either printed or just sourced off-the-shelf? I've personally had "pad build" on my backlog, and have been playing around with modifications of the Cobalt Flux design on paper ever since a failed attempt to put one on risers (apartment noise issues...), but wood- and/or metalworking have generally been barriers to actual implementation.
Maintaining it up until that point is actually also how I DIY'd my first controller (to replace a broken USB adapter), and finally learned to solder.
(It also just became less of an issue between living in a region with a few different cabinets I could drive to and the L-Tek pad releasing around a year or so later.)