Sometimes you just have to go full OVERKILL and this is a perfect example. Although the Miata engine will never make enough power for this clutch to slip, the other performance benefits should be well worth the difficulty of driving it. Should make for some interesting content and some epic driving experiences.
In case you missed the numbers:
Stock 1.8L Clutch + Flywheel: 32-33 lbs
Fidanza Flywheel/ACT 6-Puck Clutch: 23.0 lbs
Clutchmasters FX725: 16.8 lbs with the added benefit of that weight being closer to the center of the rotating mass.