Back in the day, lowered sports car life was so much easier: Install Koni Sport dampers with lowering springs and become one of the cool kids. A lower center of gravity reduced weight transfer, and the stiffer springs helped reduced body roll while keeping off the bump stops.
Need a little more spring? A set of Ground Control coil-over sleeves …
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What about FlyinMiata Vmaxx XXtreme coilovers? Or the Dekker Package from FlyinMiata (Read "Miatagasm" in Road and Track.)? Also never heard of your shock tuner, but Fat Cat Motorsports is all over the Miata forums even though their work isn't limited to Miatas.
Just upgrade to RedShift 8k/4k. Wondering what front sway bar are you running with these tests, and what do you recommend, stock or Karcept?