Glad I could help with the angle calculation. Here is something to consider. If you are not currently using the A axis you can make use of it. The A axis is rotation about the linear X axis and uses DRO 803. You can set the A axis to be active, write a value into the A axis DRO and then when you leave the script it will be there for you to see on screen.
There is also the option to do the angle calculation in Gcode using G31. When you probe using G31 the values of X Y and Z at the probing point are written to parameters #2000, #2001, #2002.
For example set up parameters
#50 = 0 (X axis change, you could set this to 20)
#51 = 0 (Y axis change, may not be needed)
#52 = 0 (Z axis change, you could set this to 3)
#53 = 0 (slope, may not be needed)
#54 = 0 (angle)
#1000 = 0 (temporary variable)
#1001 = 0 (temporary variable, may not be needed)
#1002 = 0 (temporary variable)
So go to your first probing point, set your own temporary variables to the values at the probing point.
#1000=#2000
#1001=#2001 (may not be needed)
#1002=#2002
Go to your second probing point then the X axis movement will be given by:
#50 = #2000 - #1000
#51 = #2001 - #1001 (may not be needed)
#52 = #2002 - #1002
You can then calculate the angle of the probed face using Atan in Gcode
#54 = Atan[#52]/[#50]
Once again I have not checked this out on my machine.
