I'd submit one case for testing then switch suppliers without notifying NAR or anyone else. If it has no impact on "fit, form, or function" as determined by the MANUFACTURER, no re-submit.
If NAR no-likey, Tough roxx.
The whole 'certification' process is a crock-o-crap anyway.
Toy propellant devices DEFINED and CERTIFIED by the MANUFACTURER alone.
NAR/Tripoli certs are nothing but a time consuming needless RACKET.

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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 !