The file 'Strong Slingshot For 6 Rubbers 3D Printer Model' is (stl,3mf) file type, size is 1.3MB.
I've used these rubbers: https://amzn.to/4dnZbLg
But these should also work: https://amzn.to/4ba8gFW
You can also use the ones with 4 rubbers and just leave one empty hole in each side (I suggest the middle one).
Tirachinas.stl | 928.9KB | |
TirachinasV2.stl | 1.1MB | |
TirachinasV3.3mf | 341.4KB | |
TirachinasV3.stl | 1.1MB |