After renting a scanner at the Nascar race last weekend, it is time to purchase my own. I am looking at the BC75XLT. One nice feature on the rented scanner was the simple way to switch between drivers - press car, enter the car's number and press car. With 10 banks of 30 numbers, I am guessing tuning into Martin Truex won't be a simple - button, enter 7 8, button - operation. Can someone briefly educate me on how the few cars I will follow plus the track announcer be entered/recalled on a model such as the BC75XLT? Thanks for your help.