Back to the drawingboard! Seems like im having the exact same issues with the dimensions when I printed the hexagon. The only change I made was swapping out the filament.
I saw that the belt seem to have the same angle as the old parts. I tried to import the parts into fusion to see how they lined up:
0891d580-ef14-4545-9eb8-5f8c67598b55-image.png
It does not look like the parts are fully lined up. If you look at the right side of the picture you can see the outline of the hole the belt goes into. The line is going from the top of that hole to a bit over center on the idler. Is this enough to make up the problems im having? I just find it weird how nobody else with the design have pointed it out 😕
Is there a way I can verify that it actually is the belt doing it? If I loosen one belt and tighten the other, and vice versa I should see some changes on the dimensions depending on which belt is tight/loose?