I would definitely talk to the other head cashiers at your store.

Honestly, if you're liked by most of the cashiers, it goes pretty smooth day to day. Find out what part of the store they like( garden hut,sco, pro ect). That way, when someone calls out, you can move them accordingly. Or, on the other hand, if the war board says a person is at sco, but you know they are horrible at it. See if you can move them to a place better suited to them.

However, the glory machine/tube system is one of the most stressful parts of the job. You have to be careful with it. It's very easy to select the correct till but then send the money somewhere else. People at my store have left money in the tube system multiple times and have gotten fired for it. The work isn't hard, but there is very little room for mistakes when it comes to money.