The issue with Tight Regulation (TR) is somewhat confusing. The protocol was developed by Jacqui Rand, DVM and her colleagues at University of Queensland and published in 2009. It was specific to Lantus and Levemir and it is a very successful approach for getting newly diagnosed cats into remission. That part is straightforward.
There was a vet who ostensibly used TR with PZI/Prozinc. However, the pharmacology of Prozinc is not even close to either Lantus or Levemir. Frankly, it didn't make sense to try to adapt TR to Prozinc despite what some groups on the web will suggest.