Hey Jorgenbli,
I can't find the VAR to change the Z Position.  There are registers to get the current Z and Machine Coordinate Z.  When I try to write to them they don't change/update anything. 

There is a command to change the Z Axis DRO position.    This does update the VARS relating to Current Z Position.

mc.mcAxisSetPos(inst, 2, 5.5) --(inst, Axis#, New Position)

Or make it update to a variable.

local NewZPos = 5.5
mc.mcAxisSetPos(inst, 2, NewZPos)

Just needed this - thank you (again)

You can set the tool offset with G10 L1 and the fixture offsets with G10 L2 as well. 

Steve