Hi Guest. Welcome to the new forums. All of your posts and personal messages have been migrated. Attachments (i.e. images) and The (Old) Classifieds have been wiped.
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Think about what the nozzle does, does it need to be metal? No. Absolutely not. It won't seal or direct the gas any better.
Please. Please. Remove it, bin it and we'll forget all about you ever having installed one.