Sandman, your desire to push Mr. Sluggo's healing process along scares me, quite honestly. To intentionally push him into a weight loss situation that induces ketones is dangerous. We see ketones here - anything more than a trace can accelerate into a crisis in the matter of one day, hours even.
Don't try to be more aggressive than is necessary. His situation has been developing for YEARS. He's not going to heal in a month or two. Attempting to push him into remission again, to try to make him lose weight too quickly - all of that adds up to stress on Mr. Sluggo's body that probably doesn't need to happen.
What he needs is to merrily spend as much time as possible in normal numbers - not hypo numbers, just the normal range. If he needs to lose weight, it needs to be slow.
You're experienced at anesthesiology. We're experienced at diabetic cats. We're not experts, but we're experienced. You've got a chorus of experienced people telling you that you need to relax and let Mr. Sluggo's body do its thing in his own time. If you had someone who had just read up some information on anesthesiology who wanted to ignore your experieced advice because of something they'd read, wouldn't you be alarmed? Saying the same things we're saying to you?
Sometimes the wisest you can be is to know what you don't know and to be willing to learn from those who know more than you. I'm just being honest with you before Mr. Sluggo is harmed.