Hmmm, after a wee bit of head scratching my darling lovely hubby and I have made the decision to tweak things a bit and to reduce our carb intake even more and increase the fats.
This is because his daily blood glucose readings, although still perfectly acceptable, OK, reasonable and within limits, are not quite as stellar as they used to be (now in the low- to mid-5s rather than the mid- to high-4s). Nothing scary, just a noticeable shift over time.
Now that could be down to a natural progression in the diabetes over the years, despite all we're doing to migtigate things (after all, we have been told that it is, unfortunately, a progressive condition), or it could just be an unnoticed shift in our diet meaning we have been eating more carbs that we used to (and this'd be a bigger deal for him with Type 2 diabetes than for me).
Either way, we're going to see if we can make some changes and make a difference. Let's see what happens, eh?