As with everything else, the technology progress starts to affect and change the subminiature photography; no wonder new approaches and inventive solutions to old problems. One of these problems is building a durable, exact, easy to build, cheap and obviously, easy to maintain. Enters 3D printing, a solution which has yet to convince, but I am halfway there. It would appear the main problem here is fixing the blades, while making them easy replaceable.
It would also appear that these cutters can be build for either 2 x 9.2 mm out of 35mm stock, or 1 x 16mm plus 9.2mm out of the same 35mm stock. I have both, in steel, built by Jimmy Li, and they are great tools. Best, for the moment.
Read the article here, pretty much self explanatory.