About the product that a needle start position is vertical.
A product such as Version CR is the new design which was not here in the OEM gauge. Those products change your Miata to the image which is a sports car. Easy processing is necessary when these products are attached. A function works even if three warning lights aren't turned on. Then, there is no hindrance in driving as well.
M1's OEM rev counter
The number of the warning light may be wrong. There is a difference by the country and the year model. But, there are three valve boxes of the in the case of most. There are three (two or one) warning lights in the bottom part with the original tachometer.(check, Retractable, Over Drive off for AT,)

There is a wall of the plastic which surrounds the light. Therefore, when it is lighted up at night, only the number and a scale of the part become shade. If gauge needle start position is normal, you do not need to remove any of the partition material.
Retractable can be confirmed from the driver's seat. AT HOLD is unnecessary if you are the shift of the manual.

As the way of modifying it.( M1 )
Using a nipper, twist a plastic partions and removed! Do not hesitate. After this easy work is done, all numbers and a scale become the colors of beautiful amber. A function works even if three warning lights aren't turned on. Then, there is no hindrance in running as well. (Do this work in your responsibility.)

M2's OEM gauge faces.
Miata type M2 : There are four warning lights in the bottom part with the original tachometer.(Over Drive off for AT, ABS) And Speedometer (Over heat, Air bag). There is a wall of the plastic which surrounds the light. Therefore, when it is lighted up at night, only the number and a scale of the part become shade.
As the way of modifying it.( M2 )
Using a nipper, twist a plastic partions and removed! Do not hesitate. After this easy work is done, all numbers and a scale become the colors of beautiful amber. A function works even if three warning lights aren't turned on. Then, there is no hindrance in running as well. (Do this work in your responsibility.)
Install M2 gauge. (for the type M2)