Simple Miata teeth that doesn't require any additional hardware or adhesive. Slide it right in place and use the stock bumper attachment to secure it. (see pic. 2)
Print in one solid piece without any supports.
The only post processing you will need to do is using some heat (I used a lighter) to heat up the elbow brackets and slightly bend them, that way they can slide right under the bumper. (see pic. 3)
(model designed and tested on my MX5 MK2.5, don't know if it fits other model)
The author remixed this model.
Recreated the model so I can modify the mounting system.