Hi i recently bought a Busellato 4y from 98 if I'm not wrong, designing a program in program editor of genesis (the native software is kind of difficult for making curves), but if it haves AUTOLINK you can draw in any cad program and transforming it to g code. Autolink usually comes with the software in the machine
The process is kind of simple in 2d you can draw anythink you want in a cad program i use autocad and you assign a Layer with function (bore route, etc) deep, and tool. You export it to dxf transform it in Autolink and have a program in G code for using it in the busellato, two advises always open the program in the program editor and check it twice, run test with no board and later with the minimal velocity until you get the hand of it.
I haven't used 3d they but I'm looking how to do it.
P.S. sorry for the grammar is not my native language