Hope it all works out well for you John.
I know what you mean about the 30C Rhinos. I have several 2S1050mAh 30C Rhinos that I bought several years ago and they're incredible. One of my buddies bought a bunch of 3S and 4S 2250's about 4 years ago and they have also been fantastic with IR of ~4 mOhm per cell when new. He recently bought some additional Rhinos of the same specification and they were garbage right out of the chute with IR of 12-15 mOhm per cell. His older and well-used packs are still around 7-8 mOhm per cell.
It's strange that vendors are passing off garbage now that modelers have a lot more information and better tools to assess performance than a few years ago. That's why we need to keep them honest.
Appreciate you sharing your experience!