This is a collection of more advanced parts I designed to work with the Hubelino Duplo-compatible marble run. All parts should work with the printed Duplo compatible marble run system as well. All parts include the OpenSCAD-Script I used to generate them and most are parametric so you can generate other sizes.
Some notes on the individual parts:
Put regular straight tracks between the top and bottom slope parts. A 4 nibble length of track drops 1 Lego height (half Duplo height), an 8 nibble length (long Hubelino straight track) drops 1 Duplo height.
The size 1 rotor also fits pretty well on the size 2 base (and so on), especially with big marbles like the Hubelino plastic marbles.
These really need a lot of speed for the marble to clear them. Print a small one first and see if you can reach the necessary speed. I want to design some additional parts to make gaining speed easier.
The Hubelino marble should pass this hole if it has enough speed but drop down if it does not. Add before a loop if the marble clears it only sometimes. If it does not clear the loop, it can roll back and drop to another track below.
Other Hubelino extensions I designed:
Hubelino Marble Pump
Duplo Sound Block