I have a willie hoppe predator cue with a z2 shaft. I left my stick either on the table over night or leaning hard against the rail. When rolled it on the table it had a wobble in it. I took one of those black spring loaded paper clips, rigged it up with a coat hanger. I hung it up by the ferrul left it for a day. To my suprise when i took it down and rolled it, it was straight as an arrow. Tell me im not crazy! lol