Okay, I haven't called U-Trip in about 13 or 14 years, and I only call ASA. However, their rulebook is available online at the following address:
http://www.usssa.com/sports/home.asp?Sport=17
Go to the bottom, and you'll see the link to download their rulebook.
The top of page 13 (Rule 2-2-B) says...
Quote:
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The knob portion must be welded, or mechanically attached to the bat.
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Sounds like USSSA's intent is that the knob must be permanently fixed, and those bat stinger knobs are out. Personally, I couldn't agree more.