Current car is a 16" FiST. Used to own a fully kitted (FM turbo kit with FMIC, Shiv fuel rail, full suspension, full FM exhaust with shock mounts, HDHCDD rollbar, Wilwood big brake kit, ACT clutch, FM extraction hood, removed AC, removed airbag steering wheel, etc...) 94 C package NA Miata. Loved that car. Repainted it Pikes Peak White Pearl, ran the hardtop year-round. With it's electronic traction and torque vectoring the FiST is more confidence inspiring.
It's a struggle I have now - whether to mod the FiST. I remember how different my Miata was post turbo build compared to the simple 100rwhp NA power that made me fall in love with it. Don't get me wrong, both setups rocked...but I wonder if my simple Cobb stage 1 + intake is the sweet spot. When all I had on my Miata was the suspension/rollbar intake and exhaust - it was so damned carefree, sounded great, and was FUN. Yes it was slow, but kinda like the FiST, you can drive it hard all the time and not die. Once my Miata was ~230rwhp it was murderously fast but was so serious - instant oversteer if you got careless, just momentary bursts of boost before you were really moving. It was flawless but I was always checking under the hood, carried an entire tool kit around...just in case something might happen.
Back to the FiST - FWD + open diff is a big brake on me doing anything, but seems like a simple cyborg/pumaspeed drop-in would be delightful...ugh. My last car was a 13" GTI which i modded to stage 2+ (tune, intake, FMIC, 3" TBE) and while the exhaust droned horribly - that was a quick car with those mods - very, very quick. While the FiST is dynamically magnitudes better, i do miss that power on the highway.