Nice, and great job on dealing with the unexpected!!!
Just for future reference, the no-shoot, especially when it's higher than 150, isn't a hard and fast #. One thing you can do is retest in about 15 minutes, and if the # is rising, even if it's still a little below your no-shoot, go ahead and give the shot.
Since you did retest & got a much higher # & now know that he's a little zoomer (at least for the moment), next time I would probably just go ahead and shoot on the lower PS, as long as it's above say 175 or something. That way you get data to see what works, and you gradually lower your no-shoot to 150. Generally with PZI the agreed on no-shoot seems to be 150, the no-shoots higher than that, like 180 & 200, are so you can ease into it and collect some data to know what dose is safe at a 150.
Alternately you can shoot on #s below your no-shoot (but not recommended to shoot below 150), and either monitor to be sure it wasn't too much insulin, or lower the dose maybe 0.2u and try to get some data on that. Many cats still need the full dose on lower PSs - if you are home to monitor and deal with possible unexpected lows, there's nothing wrong with sticking with the full dose. But if you can't monitor, I'd tend to play it safe and lower the dose a little, or wait a bit for a higher # like you did.
Really nice # in any case, looks like a possible breakthrough! This next cycle could be slightly off because of the late shot - maybe not since it's not that much later, but if you see a higher PS in the morning don't get discouraged. Hopefully you will see another PS like this one in another cycle or two.