So far, Mach 3 is the only controller I've successfully used. The 500 line of code limit is now really getting in my way, but hate to lose $175.00 just to take care of that problem! Is it worth it?.... I'm trying to get linuxcnc to work but have not successfully done it yet. Is there a way to get Mach 3 cheaper? Also wondering if maybe the price has historically been going down, or did it always cost that much? What are some other free controller software I might want to try?