I believe that the repairs I just performed on the extruder are going to work this time! I tried building a test dodecahedron recently and my extruder just stalled on me. This has happened before, but I think I have found the problem. The pinch wheel was allowing the filament to slip next to it during extrusion, causing it to lose contact with the idler wheel and stop extruding to fix this, I simply filed down the pinch wheel. If this works, great! If not, I'll file down the pinch wheel more until it is impossible for the filament to slip. Actually, I think I'll just file it down anyways to prevent making ANOTHER cracked idler wheel.