So a good physical look over showed no vacuum leaks, nothing I can physically fault. Still getting the idle issues though.
Hot-start idle is flawless, but once the car is warmed up it starts dropping/almost stalling. I'll upload a youtube video tonight.
Seems to be identical to this issue:
Strange idle problem with GTM SC Stage 1
Just more severe (My car actually stalls probably 1 in 3 times)