I bought a PTE PT61 a about 2 months ago and it's still in the plastic bag and has never been mounted. I took it out of the trunk today to test fit some locking nuts on the studs and noticed small holes around the compressor housing. I stuck a toothpick in them and they don't appear to go all the way through, but is this normal? Is this a casting problem and I should send the turbo back? It almost looks like there were some air bubbles in the casting and when they popped, it left little holes. I would appreciate any information that someone could provide.