Scary! Glad you found the issue, could've ended quite badly. Although, that last run would've been a LOT of fun, until it wasn't

Obviously, boost control will work better after you install a wastegate.

 

It's fantastic that you figured that issue out. I wasn't so lucky a couple of years back. I did the exact same thing on my NA.

https://www.miataturbo.net/build-thr...-breaks-88725/

And for my next expensive lesson... understanding boost source. I ended up connecting the recirc valve to the wastegate (lol @ me) and ran the car to about 25psi passing a semi truck on the highway. That was a fun 10 seconds.

I also have a White NC Club, so we have a couple things in common! Love your build, keep the updates coming.