Never got the PSII MDRM.
Could never find one for a decent price.
Now discontinued, they regularly go for well over $100 on ebay.
Just not worth the $$ to me for a 4" plain 4FNC rocket.

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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 !