Z Axis Height Calibration

[rfresh737]

I have a Mars 2 and did the adjustment per the instructions. Mine was off the Z height by 2.4mm. I did the adjustment but the cube print looked like it printed only about 2mm then stopped and left that on the FEP. I did check the homing using the dry method in the instructions and it seemed to home then come back up more than before so I assume that was the 2.2mm adjustment I did. BTW I have the Wham Bam flexi plate system installed. So, now I'm stumped as what to trouble shoot next?

UPDATE:

I took apart the Z axis to check for rail binding but there was no rail binding.

I flashed the latest firmware from Elegoo.

I printed the 20mm cube and am now 0.18 short in height. I updated the config file (Mars_Config_Modified_English_Z_MOD.gcode) and set theM8084 Z-0.18 but that didn't change anything. Still 0.18mm short in height. Any other suggestions?

Thank you...