Hubelino compatible marble run, remake of thing:159219

I noticed that the origional duplo marble run " thing:159219" had a too high ball track height (>1mm), to be fully compatible with the hubelino marble track we have. So i altered this thing by lowering the track and making it parametrized in openscad. The lowered track results in less space for the lego knobs, but i made it work. printing is possible without supports (i recommend).
I rendered the hubelino compatible stl's with _h.stl
The origional stl are also present without the hubelino tag