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close but wrong. punch out plastic and flat brass sheet fine wire for needle the flat sheet i rolled between two 1\16 tig electrodes { they are small and hard} why i used sheet brass is i would not be limited to tubing size and you can get brass in hear thickness so scale is not a problem the glass {clear plastic} is punched out the same size as the base plug. the punch is a leather punch the spur type i will post photos there is a little more to it not much.. ooh yea it is all held together with super glue there is a small jig to make but ez to make{holds the brass tight to the plastic and to set the outer ring level and close to the edge of the brass}
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