Formula Race Mirror Adapters for Mazda Miata

Improved Design for these Formula Race Mirror Adapters

These are meant to work on the NA/NB Miata and use these Mirrors from Demon Tweaks:

https://www.demon-tweeks.com/us/spa-design-formula-high-impact-nylon-race-mirror-246438/

2 things that I improved with this design: 

First I added an access hole for the mirror tightener/adjuster which is at the base of the mount. So the mirror doesn't need to be removed if it comes loose or to adjust it, although you will need access to the inside of the door to do this.

Second, the original design did not allow install of the bolts and nuts without hitting the door because they protruded. This would require modification of the door itself, which I did not want to do. So I extended the adapters and made it able to have the bolt and nut within the print so it can sit flush on the door.

These use the factory M6 bolts that are used for the OEM Mirrors to bolt to the car.

The Demon Tweaks Formula Mirrors come with M5 x 0.8 x 16mm bolts and nylock nuts, which are used to bolt to the adapters.

There are a few different versions that I made so you can choose how you want to mount the mirror to the adapter.

I only modified the 25 degree adapter, as I found that one is the best to use on the NB Miata for mirror adjustment range and can be used on the NA Miata as well.

Version 3: Threaded Bolt holes in the print, meant for M5 x 0.8 x 12mm bolts, shorter than the ones that come with the mirrors. NO nuts used. This is for if you want to maintain the original adapter thickness.

Version 4: Threaded Bolt holes in the print, meant for the bolts that come with the mirrors, M5 x 0.8 x 16mm. NO nuts used. This is if you want to use the bolts that come with the mirrors and don't mind a little extra adapter thickness.

Version 5: Threaded Bolts holes in the print, and pockets for the nylock nuts that come with the mirrors. This uses the same M5 x 0.8 x 16mm bolts that come with the mirrors. This is if you want to use both the bolts and nuts that come with the mirrors. These are also the thickest adapters, but I would recommend these if you want the most secure adapters for the mirrors and less of a chance of them falling off.

Recommend Printing in a stronger material such as ABS or PETG

Print at 60% Infill or more for strength

Print Flat on Base, with supports for the back of the bolt holes

Added Hole to access mirror nut
Revised for better useability