OMG, do I sympathize with Eric! I'm in exactly this territory with Teasel. We get them to the brink of good numbers and then have to decide how to proceed. I suspect that for some cats you have to find "the best I can do dose" that keeps them in "good enough" territory so that you can go about the other business of your life without constantly fretting about a hypo. That might mean erring on the side of a slightly lower than ideal dose of insulin. The more data on your SS, the better a picture you have and the more confidence you'll have in making dosing decisions. Metaphorically, I'd feel more comfortable standing back a small but safe distance from the edge of the cliff and staying there rather than tiptoeing to the brink and scurrying back over and over. Finding that small but safe distance takes time and where it is exactly can change over time.
Having said all this, I understand that the stakes for people whose kitties might be nearing remission are different than for those of us who are probably dealing with a long term diabetic.