The file 'Quarter Helix Marble Run 3D Printer Model' is (stl) file type, size is 60.5KB.
I've been making a lot of marble run pieces lately and I thought it would be fun to have a piece that had the tightest curve possible while pivoting around a single 2x2 brick. I came up with this, which will print without supports and if you print enough of them, will make a tall helix spiral.
2x2_Quarter_Helix_Marble_Run.stl | 159.9KB |