fusion 360 post?

hello all i have a post in my fusion 360 directory for a generic mazak and a mazak fusion 640m and need a post for a 3 axis mazak with a standalone 4th. any ideas how to modify the second post i have, i done a few before for milling and turning with g-code but after 10 years mazaks still are a pain in my ass, any ideas?

Depends how well documented the post file your starting with is the linux cnc one is well commented and simple to amend, I used to make my own custom post files for mach etc.