It is really cool GeoDave that we all like similar things. Sandy learning to change tooling in VMC - YouTube me and a buddy teaching my wife. CNC programming is somewhat close to what we program in UE4 only using G and M codes with X Y Z axis. Big difference though, if the code isnt right the machine will crash and cost money. UE4 you can be wrong all day long with your code 
Ok Im done I dont want to side track this awesome thread.