With this customizer, you have one place creating some duplo compatible track funnels. You could create 1:2, 1:3 or 1:many. You also have control about how the tracks ends (curved, straight). There are also options to print w or w/o support, optional a rim on the outside and thickening the inside rim.
Why another crossing customizer?
It's based on the "duplo interface" module. First use this module to calibrate simple interfacing geometry. When you are satisfied, you now could print funnels with this track funnel generator & have one stop for most configurations you could think about, without loosing filament by tuning whole new parts over and over. This duplo funnel generator also needs the awesome dotSCAD library.
I tested the #0 and #5 so far. Using 3 iterations tuning to the last details. These funnels should work in all circumstances. (Loc only, empty wagon in front and/or heavy wagon at the back, etc etc.) When you create your own custom version, do not forget to post a photo. :)
Nice, when using two #0_funnels, you could run your train forever making 8-shaped moves. (Although you have to fuel the train..)
I also tried this with #5_funnel, which is a 1:3. You do have control about which of the 3 joiners the train will choose! When adding 1 straight track in front, the train will move straight on. When you do a left curve in front, the train will take the right lane on the funnel.
The curved track is somewhat pointing the train in a slightly different direction, which seems to be enough for taking the right exit.
Check the other duplo compatible generators: