Hi everyone. I got a iwata hp-cs airbrush who start to do buble in the cup. After changing every part in the airbrush it still did the buble. So I put that airbrush aside for a little while. Then I learn about that little piece of the airbrush. It was completly block.. So I did clean it up. The needle pass trough the screw easily. Now the problem : I reassembled the airbrush, but I cannot pass the needle through the screw. I did unassemble it a coouple of time. It ok outside the airbrush but not in the airbrush. I checked that all the " line" is clean that the needle can go through. Someone has and idea ?