The auto tree generator in GGMax is not yet customizable, it will be, but not yet.
Of course, I've tried but am not happy with the end results, so, better wait a bit. It looks like GGMax is not ready for substantial internal changes so far.
Laptop: Lenovo - Intel(R) Celeron(R) CPU 1005M @ 1.90GHz
OS: Windows 10 (64) - Ram: 4 gb - Hd: 283 gb - Video card: Intel(R) HD Graphics
cpu mark: 10396.6
2d graphics mark: 947.9
3d graphics mark: 8310.9
memory mark 2584.8
Disk mark: 1146.3
Passmark rating: 3662.4