One of the recurring themes over on the Miata.net, is a car's refusal to start due to aftermarket alarm's and immobilizers.
Well,...last week some guy took his alarm out to cure the problem...One guess is all you should need about the manufacturer!
Of course, another "sage" noted that..."Who else would have made a better immobilizer".
Sorry, but I'm not computer-savvy enought to transfer the pictures.
Take care Bob