I think you're OK to increase. The last time Brody saw a green number is a week ago.
If you're following Tight Regulation, you want to evaluate Brody's dose every 3 days (unless a reduction is indicated) or every 5 days if numbers are under 200. TR is an aggressive approach to dosing. The advantage is that you don't let a cat sit in numbers that are outside of a normal BG range for any length of time since having a cat in higher than normal numbers can contribute to a cat developing glucose toxicity (i.e., the higher numbers become a new "normal" range). Brody has been at the 3.0u dose since early June so you could have increased much sooner than now.