I wanted a round colorfull handle for my generator and sometimes my lifters would fall into the gaps between cams. So here is the rounded handle and small cam spacers I knocked up in OpenSCAD for the Mechanical Pseudo Sin Wave (great design Greg :D).
Print seven spacers and one handle to go with your Mechanical Pseudo Sin Wave Generator. Insert one spacer between each cam... I'm sure you can figure out what to do with the handle :p