Below is my Mach3 macropump driver for the VistaCNC iMach and imachPro pendants.  This driver exactly (as near as I can tell) duplicates the functionality of the VistaCNC plug-in driver, but allows the user to customize the functionality to better suit his/her needs. It also allows a great deal more functionality than the plug-in driver, as it supports separate actions for MPG/Action_MPG/DoubleClick for ALL modes, which amounts to about 30% more functions that can be supported. For example, I did a custom version for myself that include the following functions beyond what the plug-in supports:

Zero X/Y/Z/A DROs
X+/Y+/Corner/Z- probing
Mist Coolant On/Off
Jog Speed +/-
Jog Speed Reset

Unlike the plug-in, this driver also allows the iMach and iMach pro to be interfaced through a SmoothStepper or Modbus, with no loss of functionality or performance.

Regards,
Ray L.

I'm probably going to purchase one of these pendants soon.

What do you recommend.. the USB, or parallel port version?

Your plugin here... work good with 4 axis set-up?

I'm probably going to purchase one of these pendants soon.

What do you recommend.. the USB, or parallel port version?

Your plugin here... work good with 4 axis set-up?

There is no USB version....  Works fine with 4-axes.