Another Scotch Yoke

This is a redesigned Scotch Yoke mechanism. I had posted a non-printable sample design some time ago. Recently another Thingiverse user, Sprik, had generated a nice printable design. I made a couple and they worked very well, but the design relied on printed round pins to hold things together. This resulted in a final assembly that I thought was a bit fragile. Also, the tolerances needed to make the pins work on my printer were pretty loose. This made the yoke and end pieces rattle quite a bit, and the whole assembly would fall apart pretty readily unless glued together.

The attached design, which may feature some of the worst OpenSCAD code ever, addresses these issues.

Thanks for the great inspiration, Sprik! Your design is very nice!