It's hard to make that call yet. He hasn't had this dose yet, and we do know that for a strong remission, it's important for the cat to stay in green numbers, with insulin support, as long as they'll take it. If he goes below 50 on 0.1u, then that would tell you that he's done with insulin. But he hasn't done that yet.
I'm just very aware we've had too many people starting OTJ trials too soon lately, and too many of those have been back on insulin in a matter of weeks. You want it to stick. There's no way to know if Fred would be one of those or not, but the suggestion to reduce to 0.1u, to shoot everything over 50 if you can monitor as long as the kitty's not sick - those are based upon experience with a zillion cats in this group. I just wouldn't want you to stop too soon.
That said, I have no way to know if Fred wouldn't go below 50 tonight on 0.1u, so of course, it's always your call. I just want you to be aware of the risks of stopping insulin too soon, or of skipping too many shots that could be given.