What's more, the borosilicate laser tube design shown in the optical resonator section has been fabricated. All I have to do is drive a few hours to pick it up.
I have designed the tube flange, as shown in the same section. I'm waiting on the glass-to-metal sealing company to let me know if that design will be appropriate for their process.
Finally, I sourced some very pure oxygen-free copper pipe to serve as electrodes.