Arrma Granite bumper spring

Arrma Granite bumper spring. I don't know if it fits other models.

I broke the front bumper spring and after reading the reviews of the factory replacements "buy a bunch", I figured it would be worth my time to try to make a better one. The 3D printed version has had failures, but from pretty big hits. I don't make any claim that these are stronger, just that it's a lot easier to print a replacement than order one.

Nylon - seems to break on the lamination layers. My print temp might be too low

PC - Has about the same flex as the stock bumper. These just snap when they break.

TPU - Did a test print, but it's WAY too flexible. I'm in the process of designing a thicker one. Stay tuned.

- Use high perimeters so essentially it's a solid part
- Use supports from just from the build plate.