Drill rules state "Neither the pencils nor the sharpener can be mounted or attached to anything that is not a part of your body."

"Anything" would technically include the drill, which would make the category impossible to perform.

Proposed amendment:

"The pencils cannot be mounted or attached to anything that is not part of your body or a drill. The sharpener cannot be mounted or attached to anything that is not a part of your body."

Is there a component that lets you enter manual goal split times?

Ideally it could trigger a sound if the goal split wasn't achieved.

Why doesn't it show the end?

Would this description of it be accurate?: it shows you a time for each split. If your split time is greater than that, then you have less chance of PB'ing your run than if you just started your run from the start again. (that's calculated using your previous split time averages, etc).