Track adaptors for toys on model engineers' dual gauge track.

This system is for 48mm gauge. Do NOT download these pieces if you just want a large gauge track and models. Consider a standard gauge, for example 45mm for 1 (or G) gauge or 63mm for 2 1/2" gauge. However, if you have access to a model engineers multi-gauge track; and they have 5" and 7 1/4" dual gauge (so you are probably not in the USA or Japan); and they use 10mm wide rail for the 5" trains; and you have ever wondered if something might be done with the long gap between the 5" and 7 1/4" rails; and you have or know children or grandchildren who might like to make trains with Lego or 3D printing to run on a long outdoor track; then this system is just what you need! The track pieces are based on the OS railway system, configured for 48mm gauge. The ramp is there to lift trains out of the gap in order to clear mainline points or fishplates, also to allow connection to a balloon loop or other trackwork. The various models have more or less tolerance to variations in the gauge of the steel rails. The points are trail-only from the branch and are intended for a balloon loop to allow trains to return whence they came. They are made in two parts to fit on a 200mm printer. They can be joined with three M3x16mm screws or glued together (upside down on a flat plate using the indicator groove to ensure perfect alignment). You (or the kids) will need to make special arrangements for wheels and axles. The first alternative is to use Lego motors with longer Technic axles and the garden gauge Lego wheels that you can find around Thingiverse, e.g. *. Bogies for freight and passenger cars can be made using Technic parts and the same wheels. Most Lego train wheels are too narrow. The second alternative for the engine is to use the wheels given here and fit them in place of O-gauge or 1-gauge wheels one of the many engine models on Thingiverse that use a TT-motor. (The cheap motor with a yellow gearbox and a plastic output shaft on each side). Here is a converted TT-powered model: https://youtu.be/wbmSgbZDNXI Hint: When choosing models to convert to G48 do consider the scale. For standard gauge the scale should be 10mm to the foot. For narrow gauges the scale will be bigger. If you select models intended for 2' gauge (so 16mm scale) they will look good as 3' gauge models on this track. Likewise LGB-compatible metre gauge models. Warning: All the track, trains and children should be clear of the dual-gauge track before the 5" or 7 1/4" trains arrive. Obvious, but one does get distracted sometimes. '* Here is a link to Lego wheels https://www.thingiverse.com/thing:3556188 There may me more if you search. These might be a tight fit on the Lego axle so print just one to try. If necessary adjust the printer or slicer scale in 1% increments up or down until it works, then print more wheels.