The B8 and C5 series were decent motors in that they could lift a good bit more than the run of the mill B6 or C6 motors, but they were no B14/original B3.
I have quite a few B8, C5 and B14 motors in my stash and still fly a few of them each year.
Needless to say I fly on my own private land and am not the least concerned whether their "certification" has lapsed.

Probably at least 25-30% of the BP SU motors I regularly fly have been de-certed....never had a CATO either with any of them except the following:
Estes C5-3's from the "bad" lot before I knew it was bad
Estes E15-x, about 30% CATO rate for everything but the E15-P, which has NEVER CATOed for me to this day & I still fly the "P" variety, but nothing else.
FSI E60-x; over 75% CATOs
FSI F100-x; at least 30% CATOs

The majority of the B14's I have are of the B14-0 variety.
I am down to around only 3-4 packs of B14-5's and 7's.
I think I only have 2-3 loose B14-6's left

__________________
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, TURMOIL, FIASCOS, and HAVOC !