The New 3D Printing Thread

One solution to the printing issues might possibly be to print them on an SLA (UV resin) printer, but the issues there are;

1. Resin printers have a much smaller build plate, although they are slowly getting bigger even the biggest domestic one would probably require the track to be printed in 3 maybe 4 pieces.

2. Most resin prints are printed hollow, partly to save cost as the resin is expensive relatively to FDM filaments, secondly if you print the models solid you can sometimes get issues with them literally cracking or in extreme cases actually exploding. The reasons for this is that the resin prints once completed are not fully cured, you need to subject them to UV lighting (or daylight) to finish the curing process. If it is hollow then you only have the outer shell to worry about and as long as its not too thick you get a full cure. If it is solid then the inner resin does not necessarily fully cure if the model is too thick and this partly cured inner can cause the outer to break due to slight shrinkage etc... The thicker the model the more likely you'll have trouble, not to mention as i said the cost. I've not checked the prices recently but typically a 1 litre bottle will cost some £30+, FDM filament if you use for example PLA is typically £15+ for a decent type, although if you want fancy colours, silk or whatever the price can rise to £30 or more for some of the more esoteric types.

3. Resin prints while typically stronger are also more brittle and do not take flexing very well.