Worried about my MazdaSpeed3

Long story short bought a speed3 off a dude and pretty much sold me a lemon but I love the car. First turbo blew, than engine blew. Just got a rebuilt engine and brand new turbo, fixed all the oil leaks and no oil is burning. I have an aftermarket cai and Cobb port. Stage 3 tune on 93 octane. Pushes about 15 psi, thinking of tuning it down to stage 2 around 10 psi. Should I be worried about another engine blow? I means it’s under warranty but Idk much about the car.