I just bought this sensor and wanted to add that the new case is injection molded, not 3d printed like the older version.

It still uses the "Roller Encoder v1.2" PCB.

I noticed the idler wheel with "V" groove was not lined up, so I loosened the 3mm screw to give it some movement, so it can match up with filament against the roller encoder wheel. Here is a picture looking through the filament channel, you can see the "V" is now center, where before it was toward to bottom (misaligned).

I'm very interested in looking at the quadrature output, if it exists (maybe in another thread). Also, this platform might provide a way to replace the quadrature wheel with solid plastic part + 1x2mm magnet(s) with analog hall effect sensor + ATTiny45 to make higher precision (definitely other thread).

Thanks for the prior research thus far, this was very helpful to me, and I wanted to contibute some current pictures and my tip about aligning the idler.

-Scott