Keep in mind that shooting early is like a dose increase and shooting late is like a dose decrease.
Since you shot late, you will need to gradually get back on your regular times. This can be done with a maximum of 30 minutes of adjustment in 1 day and given his sensitivity, I'd go with 15 minutes per shot to sneak back to the original shot times until you are there. For additional safety, you could also slightly decrease the amount of insulin ("skinny" it). This will cause some wobbling of the numbers, so have patience. You'll need roughly 5 days, give or take a day, to settle.
Because you have been collecting glucose test data, you now see that it can be safe to give him insulin when he is lower than 200. I think I would set your new "no shoot" number to 150, so long as you see him behaving normally. If you can, get +3, +6, +9 tests (mini curve) to watch the pattern emerging.
Also - are you testing for ketones? ketoacidosis may cause breathing changes.