Sue:
I understand that you're apprehensive about Frankie dropping too low if you're not home to monitor. I understand completely since I'm not home during the day and have the same concern. I do think you need to weigh your dose increases against allowing glucose toxicity to build up. If you could consider raising Frankie's dose by 0.25u until you start seeing numbers closer to the range you're looking for might be to his benefit. The longer he spends in these higher ranges, the more wear and tear on his system. Generally, people make the "fat" and "skinny" dose adjustments once their cat is in the desired range.