WTH is this "Shelf Queen" concept you speak of ?

ALL model rockets should FLY at LEAST ONCE.
No Fly=NO GOOD.

Better to fly and POWR-PRANG CRASH than never to fly.

The ONLY POWR-PRANGS I have ever had though have been DELIBERATE ones. Best way to do that is to use a C6-7 or C6-5 in a multi-stager as a BOOSTER engine with the clay above the ejection charge broken up a bit.
The rocket WILL be pointed straight DOWN when the 2nd stage ignites.
POWR-PRANGG/LAWN-DART/CORE-SAMPLE TUBE-CRUMPLING FUN !!!!

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !