Hi,
I am making train rails in Ldd by using flex cables, pin connectors and lamp holders, The tubing goes through the hole in the lamp holder, and pins connecting the pin connector sleeves however since I need corners and at a range if different angles for more realistic layouts I need to be able to flex the flex cable to a curve like this one.
This means having it so it is curved 'perfectly' meaning there is no S shapes, even slight ones, and also means that if you cut it in half the curvature should match up, once I know how I can do this I can actually start building descent track, the tubing should not be sloped up or down though with this same possible technique provided it will make this possible for when I want to use sloped track and even track terminals (to switch tracks).
Note that the two tubes will be joined together to make one section of straight or curved track, if this is too hard to do, you can use a longer flex tube if you want.