... on Shapeways (at cost) for anyone who wants to experiment/evaluate the concept. There is a single-slip design in the works. Currently it's 4-SF, but I'm thinking of converting it to P4. My thinking is that if this system (is it a system?) works for P4, it has some legs. Andy. posted: 6 Feb 2018 07:33 from: Andrew Barrowman Yet another sample, except that this one was printed on my 3D printer. The rail is SMP. 2983_060144_360000000.jpg The printed material is a blend of PLA and something called PHA. It's a lot tougher than pure PLA which makes it ideal for the chairs. I had to apply a lot of force to break them. Frosted Ultra Detail resin (from Shapeways) has a bit more definition, but not all that much more definition. (Bear in mind that the above image is equivalent to holding the sample about three inches from the end of your nose.) I'm printing plain track here to evaluate the chairs. There are ...