Originally Posted by
Grand Bois
I don't think you've thought that one through. Cutting out a small section would not allow the cup to be inserted.
I'm not saying to insert the cup. I'm saying to insert the piece that was cut out. Just cut out a 1/4 of the circumference of the cup, and use that small piece of the cup as a protective barrier. One would have to remove the exterior wall of the cup as well. You'd essentially be left with a 1/2"-3/4" wide semi round piece of metal with threading on one side.