Zaphod Beetlebrox

Would have been nice to have some sort of a pull out force for each of the methods. Maybe a straight out pull, and a 90° pull. See which is empirically the strongest.

I think any cut that you make will also decree the ID, it might not be a big enough difference to mater but maybe it would. Most filaments specify a tolerance of 0.05mm. If you have a Bowden set up you could just leave the tube on, it won't be able to go through to the extruder wheel. At least not on my printer, could be different for you. I think the lengthwise cut would be better than the spiral. But might cause the same problem.

Loss of rigidity would probably negate the selected interior diameter of the PTFE tube.

Very cool idea.

I did 3D print it, but I did it in pla because it was cheaper. A lot of the peices were broken by the time they arrived at my house. I had it at half scale as well, so many parts were too thin. But I think it would work if you had your own printer to expirement with the wall thickness. Let me know if you end up building it I'll give you a three month pro membership if you want.

Was that originally a Parker SR-1? Would like to see the process for making the scales, as I think pinning for the shavette would be different from that of a traditional straight.

Oh cool thanks I look into it.