Test fitting the 1/4" PVC cut from a 24"x24" sheet.

Gluing with standard plumbing PVC primer and cement.

Trimmed.

Patched and ready for roundover routing.

Attack of the Clamps.

Painted and ready for its guts. The gearbox is already sealed and doesn't need protection in the enclosure.

But first, the enclosure needs a special sleeve to seal the drive shaft. Being able to fabricate one-off parts is a huge part of real-world engineering. Good luck trying to buy something like this at the store!

And here are the guts. One more thing done, but lots more to go...

The optical speed sensor.

Mary, Miles, and Bruce getting close on the plumbing.