I wanted to share my thoughts on crimson knight for hybridizing since it doesnt come up often in the forum. Im in charleston south carolina and this one is very disease resistant here. It is one of my cleanest bushes, comparable to spice, peggy martin, plum perfect, queen of sweden, and the knock outs. It doesnt like to set hips, but i have seen hips on it before, just not from my intervention. It does produce a low number of anthers, and they are fuzzy. So when ive tried to collect pollen, itll explode into my container and get mopped up by the fuzzy bits so getting pollen can be tricky. I havenāt been able to use it in hybridizing yet, but i feel like it has a lot of potential and flower power. It also has a good fragrance. I wouldnt consider it strong though. The petals scorch here when it is more dry in the high heat, but still remains beautiful.
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I canāt respect breeders that intentionally omit pedigree information about their work. It leaves a hole in the knowledge about a breeding line, and itās only done to obfuscate what the breeder regards as āproprietaryā information. Feh.
I donāt care how good a rose is, I wonāt use it in breeding if I know absolutely nothing about the roses that went into its making.
I think itās a false premise that by hiding the pedigree of a rose, the breeder is somehow āprotectingā their creation. Anyone can repeat a known cross and never find a similar rose among 100,000 seedlings. Hiding pedigree info is just selfish and does nothing to further the understanding of extremely important aspects of hybridization, like overcoming Blackspot susceptibility.
But donāt let my opinion dissuade you from trying to employ it in breeding - itās just an opinion.
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Which āCrimson Knightā is it; GRAnib or JACmered?, which sounds like a deeply personal and HUGELY INAPPROPRIATE question, but isnāt. 
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That must be āGranibā, a.k.a. Brindabella The Nightbird/Crimson Knight. Iāve had one for two seasons and it has been a slow starter so far, also a bit slow on the rebloom, and the flowers can crisp in the heat as already statedābut it does have fairly healthy foliage.
Iāve grown āGrapplā, a.k.a. Brindabella Pride/Purple Prince, some years longer and like it better. Itās pretty healthy in this tough climate and very fragrant, and the fast-repeating flowers have held up relatively well in hot weather. It sets hips easily and the seeds germinate well. Iāve grown many seedlings from various crossings but still havenāt found the perfect combo yet. Despite the slightly cryptic reported parentage, I suspect that it is really from āGrasuperā a.k.a. Brindabella Touch of Pink crossed with āSomnipā a.k.a. Blackberry Nip.
Stefan
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Itās not just their breeding thatās unclearā¦
Itās funny looking at their site on web archive and looking at some of their early ātigersā
Based on comments on HMF they donāt know where they got these roses either but itās probably pretty obvious 
They seem more focused on branding than anything else.
oh look, even further back on their website
https://web.archive.org/web/20050420034709/http://www.brindabella-gardens.com.au/
Same picture with original nameā¦funny that
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How many of the Brindabella roses have made it to the āstates, though? I mean Bregingew is in Charleston, SC, USA, and the Brindabella brand is Australian. There doesnāt seem to be much exchange if any between the two countries, at least from what Iāve read here on this forumā¦
I also wonder if it might not be the rose MEIelec, aka Scarlet Knight/Samourai, which I purchased in a body bag last year at Home Depot. When it bloomed though, the flowers were nothing I would call scarlet, but the pinky-magenta toned āalmost a stretch to even call it crimsonā shown in the OP photo.
Dusty.
I believe based on everyones comments i believe itās āGranib,ā here is where i bought it
https://www.wilsonbrosgardens.com/rosa-crimson-knight-brindabella-rose-2g.html
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Well, THERE WE GO! They offer a handful of the Brindabella line. Nice.
For MANY years, the excuse for not being able to obtain Australian roses was
āRose Wilt Virusā, which never existed, but was sufficient to prevent amateurs from importing from there. New Zealand was also disparaged as having the ādiseaseā and it was capitalized on by US rose houses to prevent competition from amateurs importing McGredy varieties they didnāt have the lock on. The disease was sufficiently terrible to prevent them entry into the US, yet J&P brought in McGredy roses right and left as their exclusives. But, never any which were too similar to any of THEIR own seedlings.
Thatās also where I purchased my plant. For what itās worth, I recently ordered a āBrindabella Touch of Pinkā (āGrasuperā) from them and am watching to see what it does. It arrived with blackspot on many leaves and still hasnāt shaken it off after a couple of months, so right away Iām questioning its supposed resistance, but that would be in line with what others have found to be true for its sport parent.