@ Xeltron245 .....building the dat file for gp4 tracks takes time & practice...
the new version of gp4 builder certainly helps, but there is a lot to learn...
the tried method is to start learning all the functions by building stuff & experimenting....i'd start with a basic fantasy track first...this will be less demanding as you set the limits etc....then when you have learned more take up this project again......
don't put pressure on your self from the start by building a real circuit as this is supposed to be fun also.....