You can add trash until the compartment is full and the compactor will not compact the trash any further. The compact cycle time will be shortened as the compartment fills up. During full cycle the ram travels 2/3 of the way down into the trash bucket.
With Humalog's short action time of 3  hours, covering postmeal highs with more insulin can be considered as soon as two hours if a meal dose have been underestimated. Of course, not as much sliding scale insulin would be needed here as before a meal, because some of the meal dose is yet to work.
It's taking everyone way too long to get down. I'm Type 1 and can get down to the 100's from 250 to 350 in 4-6 hours. If it's in the morning before running, then I take a lot less Humalog (instant) insulin to correct because my sugar can go lower faster on the treadmill.