Hi. You've seen a few better numbers, but what makes you think he is going into remission? A cat has to be in consistently good numbers for awhile before you try going without shots. Then, they have to make it 14 days with no insulin, still staying in good numbers, before it is considered remission. By 'good' numbers, I mean maybe between 75 and 125... maybe occasionally slightly higher but probably not more than 150 (AlphaTrak numbers).
If you could grab some mid-cycle numbers at various times, it would really help show what is going on. You do not have to do a full curve (which is testing every two hours), and you definitely do not have to test every hour, but grabbing a test or two during each cycle and varying the times will start to fill in enough data that you can see the true impact the insulin dose is having.