Can you tell me how you figured he had a hypo? I don't see any numbers indicating a hypo on his spreadsheet. With a human meter like the Relion, we typically give high carb food if they go under 50. I did see this extra information from your post on Feline Health:
6/20 new-ish from before page was reactivated
He is bouncing, and that's perfectly normal. I've seen a cat (non acromegaly) bounce for 8 years on insulin. Try not to worry about the bouncing. Cat's bounce either because they see numbers lower than they are used to, or because their numbers drop too quickly. The way to help them to bounce less is to get them to a dose where they see more lower (but safe) numbers so get used to them, or in the case of fast drops, learn how to use food to slow down the drops.
Cats do not bounce because they get into higher carb food though it can cause higher numbers. I notice on the spreadsheet that he is getting Tresaderm. That includes a steroid and can also raise blood sugar numbers. How much longer will he be on the Tresaderm?
The reason Baxter's numbers are so high now are because you lowered his dose too much. I don't know if you are following a particular dosing method, but at most we would have lowered his dose to 5.25 units. At 3 units, he is spending all his time above renal threshold. His dose needs to be increased.
Somogyi does not exist in cats, there has been research showing that. Unfortunately not all vet are up on that.
Absolutely no need to retest from MSU. He has acromegaly, that won't change. Also no need to do any imaging. The only people who have had imaging done are those that proceed with either radiation therapy or pituitary surgery, where imaging is needed to figure out how to proceed. What you might want to consider is a medication called cabergoline, which has helped a number of acrocats here. Lots of posts about it on this forum about it.