HOW DO I EDIT VB SCRIPT TO RAISE Z UP 2IN ONLY WHEN I PUSH REF ALL

I’m using mach3 with no torch control system on a plasma table with a floating roller ball head and switch offset in my gcode the problem am having is crashing my torch head into the table or material when homing I need z axis to rise up 2 inches only when I hit refall

here is my xml file if anyone can help me it would be very much appreciated



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