what I am saying in the future, Radioshack might take advantage of these frequencies in the zip zaps instead of just using two. I do not know if Tomy will take advantage of this because they do not even market in USA. but Tomy might do this because having a ton of frequencies would be great for races. And also it might be hard to make recievers for these frequencies that is small enough to fit in a bit charg.
But hey I am not really sure if this will work.
I am taking Radio Communications in Industrial Technology, and I will ask my teacher if i can buy a compatable reciever that is small enough to put in my bit. Then there is changing the frequency in the controler which should be a little easyer, because of the size. Also There is a other way to change the frequency in the controler. I could buy a mini-z controler made by Kyosho which is easy to change the frequencies and make a mod to take advantage of new frequencies
I am sorry if i do not make sense, I am horrible at explaining

. But basicly what i said is, it probly is possible to change the frequency in a bitcharg and the controler, and still have 30 total frequencies that are legal in america.
I just want people to know what I am investigating currently, hopfully this will work.