On this forum, we use a preshot value of under 150 as the number where you stop, do not feed or shoot, and post for help, if you are following TR.
Here is a
post on Neuropathy, with links to videos.
Note that a cat's insulin needs can vary over time. Their pancreatic beta cells have the unique ability to heal, provided they spend enough time in healing numbers to give those beta cells a chance to recover. That does mean dose needs can change. With healing, the beta cells produce more insulin on their own, and less injected insulin is needed. And if the cat stays at a dose that is just resulting in high numbers for too long, their body gets used to it, and it can cause
glucose toxicity that results in beta cell loss. Glucose toxicity is a type of insulin resistance and needs more insulin to break through it.
Printing out the sticky notes is an excellent idea. There could even be a time when the power goes out and you lose connection to the internet. I had to test and shoot a couple times by flashlight.