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I had a thought a while back, but didn't post it. I'm watching a PnG commercial right now and am thinking why not. We could market a brush to the vibrating 16 blade guys by purchasing the handles...

What about Tom Servo?
I'm also thinking what about gutting a dog/cat statue, inserting the innards from a stick blender. It could be like the donkey cigarette dispensers!
Or maybe a real...no, no,...

Vixctor,

If you do want to set a knot into that glass I would suggest sanding that hole first. I don't know what you have available for tools, but I personally would take my scribe and low grit...