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You can do like Scott of the now defunct Hawkeye CRT rebuilding factory: wrap a
few layers of duct tape around the neck of the tube, and use a very sharp steel bit
rotating at high speed to drill the glass through the tape. The way Scott used to
do it, it seems like it would heat the glass rather than really drill it, and eventually
a small hole would result, letting the air into the tube over a few hours.
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