Well the Miata is ALMOST done, all the fluids changed + all the other ridiculous stuff.
Car hasn't been started since February, put the intake on and it fires right it up........let it get up to temp to bleed the coolant system.
Yep, still leaking (we did the reroute kit because it looked like the nipple on the old plate was leaking)................................turns out? It was a pin hole in the hose that goes from the plate to one of the heater core hoses.
At least it should be a simple fix! (also means I could have saved myself that hassle!!!!)