Blee017 & =C= please check your PMs.
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Now I have to disassemble my second stage to replace the other rubber piece, right now it is held together with safety wire because I lost a screw....
and yes, there's a possibility you'll scratch something.
Gurus please look the other way while I pass on a piece of heresy: I boil the Tee, fit it on one side (long/lateral side), poke a rather large and dull flat screw driver through the exhaust opening on the other side, jam the tip in the round opening of the Tee and use it as a lever to stretch the hole. And yes, there's a possibility you'll scratch something.