You should be able to tap the right thread into the 5K butt - it’s M16x1.5mm (Metric Fine)
It’s not a perfect tapping size hole, but very close so you still get a decent thread to fit the QR bumper into.
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I own a very similar Tad Hoppe. Mine has the big pin but a steel joint, not the Juma this will most likely be.
The won’t make you a “Hoppe” cue anymore, but when they did the tag was $4K +
$2500 is a killer deal.
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