Rails for lego particle accelerator

I got the parts fora delightful particle accelerator for Christmas (http://jkbrickworks.com, ). However, I did not get the curved track pieces. Since I have a 3D printer, I have designed replacement segments for the ring. I have printed out a set and they work well. The segments are not direct replacements for the track pieces, but are meant to substitute for two curved tracks and associated parts. Since my printer is only barely good enough to make holes for technic pins, and not good eno