Peter is building a 3D printer.He fancies a Rostock configuration. He has been doing some design work using OpenScad. Today he brought some designs round and we had a go at printing them. Lessons learnt, rounded corners are hard work. The printer builds objects layer by layer and if the edges are curved it seemed to make it harder to just print the outer layers. Peter was able to rearrange the drawing really easily and we had a go at printing again. The output looks like it might prove the basis of a print head. The next thing to do is print some of the side struts and the carriages that go up and down the pillars.