Well. First, I'm usually between 65-140. But I've spent the past couple days trying to knock down 160s so I wouldn't want you to think that I live in diabetic shanga-la.
If I had to guess the reason my blood sugars are as stable as they are is that I'm only 5 years in with an initial diagnosis at th age of 57. I assume there are at least a few beta cells hiding out and doing some heavy lifting.
I eat a lot of fat and fiber to slow the initial spike. My breakfast is 2 egg beaters, 2 slices of sprouted grain bread with about 60 grams of peanut butter, a cup of tea, 8 oz of 1% milk and a medium apple. That comes out to around 65-70 net carbs. I dose that total minus 10 (for 65 grams I dose for 55). Two hours later I dose for 16 grams of carbs and correct back to 95.
For lunch I usually eat a salad dressed with lemon juice and olive oil topped with about 110 grams of chickpeas, a couple of high fiber crackers, 4 oz of Greek yogurt, a small square of chocolate and an apple. I count and dose this meal. My goal is to be around 120 about 3 hours later which is when I exercise.
I have more variety for dinner and simply count and dose.
I take a long time to eat so that if I dose right before I eat, the bulk of carbs are eaten about 20-30 minutes later.
I don't know why this works. It does and I feel lucky.
I have experimented with net carbs, and it never works--60 carbs is 60--carbs for me, no matter the fiber and "net" numbers. I think it takes awhile for the "fiber" to affect the net numbers....
I eat about 70-80 carbs per day (I am almost 60 years of age.) My last A1C was 5.1. I control tightly, but still fling! I had 80 carbs today, and Chinese food (with a square wave bolus).
The "magic" is understanding how food affects you. I truly admit it is hard to understand all this, and I truly do not. I know the "Ps" are bad and I can't always control my reaction to them: pizza, pasta, and peanut butter. Also, a great love for me: oriental food--Chinese, Thai, Korean, sushi...Sometimes I do great with the Ps a
nd sometimes not. I absolutely do not believe nutritional labels--often very inaccurate.
I feel like I am often in a cr*pshoot with carbs--what number do I play?
I haven't put much effort into low carb dosing but I often get poor results with a high protein, low carb meal. It took me four years to gain back 9 very needed pounds on the diet I eat now. I'm not sure I could even maintain my weight on low carb. There's just so much fat I can eat and I'm not really that fond of meat and other high protein foods.
I pump with a Cozmo, set my duration at four hours and reduce the pump's insulin on board calculation by 50% after 2 hours. The Cozmo calculates IOB straight line. I don't tend to get much downward action after about two hours. In fact , I'm higher at four hours than I am at two hours a fair percentage of the time. It may be that my basal is set a bit too low and my bolus a bit too high. I haven't put the effort into sorting that all out.
Don't drive yourself crazy. You have excellent control and the small improvements that you continue to make will probably have a positive but relatively small impact on your health. I have only admiration for you and others who have been at this for decades. To work at this for 35, 50 or 60 years is an incredible slog.