Agreed. They are rough, not bad for a prototype i built on salary of a part-time library employee ;-> The quality will certainly improve. I have demonstrated proof of concept & have clay trace widths down to 450 microns. I have been able to print mini clay pots up to 25 layers tall. Clay blend formula is current topic of R&D. The essential challenge is to extrude with thick enough clay that it does not slump, yet thin enough to fuse together as it dries. -david