I think it would be simpler and easier for me to stick with micro switches.

So that I am clear on this the connections would be made as follows?

2 micro switches for the X axis into IN2 (already occupied by the emergency stop switch)
2 micro switches for the Y axis into IN3
2 micro switches for the Z axis into IN4
All configured in Mach 3

Sorry if I am confusing the matter it's just electronics are not my strong point here.

Regards

Roy