The stock camber adjustment bolts don’t stand up to the abuse of autocrossing.
Paco Motorsports offers a clever solution.
Paco Motorsports locks replace the slotted washer on the stock camber adjustment bolts.
Install them on the front and/or rear lower control arms to assure that your alignment settings stay put.
The teeth on the lock represent increments of +/- .25 °
Sold in kits of 2, 4, or 8 locks.
Mazda camber adjustment bolts and nuts are available in the store here.