I’ve been playing with designing and 3D printing small parts for my DFXL I’ve posted one design on Thingiverse. This is a aerodynamic shell for a B&M Cyclestar mirror. Here is the Thingiverse link.
Here is another design that I’ve played with. This is a chain keeper for the front idler on my DFXL. The first iteration of this was just a bit too close to the bottom of the idler so the chain slap was too irritating. The next iteration will be about 1mm longer.