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.
Regular insulin, available since 1922, takes 30 minutes to start working, peaks at 3 to 4 hours after the injection, and continues lowering blood sugars for 6 to as much as 8 hours. Humalog, on the other hand, begins working in 10 minutes, peaks at one to one and a half hours and is gone in about 3 and1/2 hours.