I love watching this happen but I dont have the knowledge or set up to give it a proper go, the latter being the bigger issue.The big thing for me to wrap my brain around as far as fermenting is concerned was forcing myself to leave meat out at room temperature and believe it is safe. I had to trust the process.... the hurdles that hinder bad bacteria growth and help the culture were key for me. The pH meter was peace of mind when I started, but now it is a valuable tool for me to dial in the amount of sugars I need to drop the pH to a safe level at or below 5.3. Once you add that culture to the meat, it should never see refrigerator temps. while drying. That culture needs to work rapidly creating acid and crowd out the bad bacteria. The bioprotective bactericides need to be made by the culture. Once I really understood this, I felt way better leaving the meat out. Also, the clues to good fermentation help....the sweet fermenting smell, not a putrid rotting smell tell you all is going well.....
The degree/hours formula for safe fermentation should be followed. this tells you exactly how many hours at your fermentation temperature you can allow the meat to stay out until pH 5.3 or lower is achieved....This is to limit Staph. Aureus growth.
I have done the Umai stuff and its turned out great for me, so I understand the process you speak of.
One comment you made above made me question something.
"Once you add the culture it should not see fridge temps". That is the basis of everything Umai does when using their system.
Mix, stuff, ferment all like you did above, but then you put in the fridge for weeks at a time to dry. I also used the TSP-x as well like you did.
Not picking a fight in the least, just trying to learn.