Though an unofficial sprint, this one ended with our project reaching full completion. Everything came down to mechanical fabrication and system integration, with some finalization in software and electrical.
We created our marble run, finalized the needle and record spinner, added another LED strip, and CAD modeled and cut an entirely new housing. Assembling the whole crystal and inserting our electronics in the back brought hours of troubleshooting and fixing every possible issue, as integration does. See below some of the pieces before they all came together.