There's no way you will cut extra thread without a proper die. I have one and am happy to do it for a beer, I'm in SE1, it's not a big job as long as the section you want threading is not chromed - chrome is death to thread cutting tools.
@retrodicorsa started
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There's no way you will cut extra thread without a proper die. I have one and am happy to do it for a beer, I'm in SE1, it's not a big job as long as the section you want threading is not chromed - chrome is death to thread cutting tools.