Wavelight2

This is a modification of https://www.thingiverse.com/thing:2573484 - I changed the cross-section shape of the wavy parts from rectangles to ellipses. I wanted to strengthen these parts so there would be less movement when printing the upper sections. The change in cross-section helped some, but the results were still not as good as I hoped for. The net result is that the tops of the waves end up being a bit bumpy.

The good news is the spaces between the waves are nice and clean, so that gav