used to put a bit of paper in the hole, and if it was a machine screw i would wind the screw in then back out, and wick the paper with thin cyano afterwards, always worked well, self tappers, just push the paper in place around the hole with an allen key then cyano it. now use a soldering iron with a 2mm piano wire tip and feed in 1.75mm 3d printer filament... also if you are re doing holes like this, keep a tap or a screw with a notch filed in one side handy, makes new threads much easier to cut and stronger
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