Another marathon mathematical object run for the 3D printer – this time the Roman Surface (seen here in front of a Klein Bottle).

I had generated this surface years ago using Mathematica and had spun the object around in 3D, but still couldn’t quite assemble the thing in my head.  Now I can hold it in my hand I can see it clearly.

The 3D printer has been taking such a hammering with these extremely long prints that the X Y bearings are now sounding a bit klunky.  New bearings are on order.