Yes, im a pre loader 6 months in and I already understand the car moreso.
Have you ever pre-loaded a car before? Well, silly questions really on my part, I find most people have no idea how the car works. And this being people who have worked for UPS for years.
Your panel does most of the setting up, you just have to do the real dirt work. Make a section vanish, then use the empty space to set up your next set of routes. Hopefully, you got a decent preloader that understands the count in the car, and loads it towards the forecast. Otherwise, they are just putting in boxes without the pass system.
But really now, they will see you taking this route too hard and cut the number. Besides, resends arnt too bad, it will get there sooner or later. And that just leaves practice, yes thats all. Pre-loading took me about 2 months to fully catch on all around. Rome wasnt built in a day, it took time.