add claystack image

kunits/README.md

@@ -72,4 +72,7 @@ This set assumes you're building with 3/8" HDPE or similar, Nema 23 Motors with
 [Madison Park Vocational Machine](https://gitlab.cba.mit.edu/jakeread/mpvmachine)
 
 ![smallgantry](images/smallgantries-fab.jpg)
-[Small Gantries Workshop Machine](https://gitlab.cba.mit.edu/jakeread/smallgantries)
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+[Small Gantries Workshop Machine](https://gitlab.cba.mit.edu/jakeread/smallgantries)
+
+![claystack](images/claystack.jpg)
+[Claystack Ceramics Printer](https://gitlab.cba.mit.edu/jakeread/claystack)
\ No newline at end of file