I will start by saying that I don’t have your MetalMaslow set up, but from all my reading here on the forums, and working on my own Meticulous Z axis, I know if you command it to go down, and it moves up, you need to change the “-/+” sign in your pitch (raw Z-axis - again I don’t use Makerverse). so if you have -918.75 and it went up instead of down, the logic to me would say make it 918.75 and see if it moves in the right direction.
After that, I use the following error calculation method from the Meticulous Z post (Comment #618) to get the Z-travel dialed in:
To calculate the movement error:
E = D2 / D1
Where:
E = Error
D2 = Distance the carriage actually moved D
1 = Distance the carriage was requested to move
To calculate the corrected setting:
C = Z * E
Where:
C = Corrected Z-Axis mm/rev
Z = Z-Axis mm/rev from the test
E = Error
I hope this helps out a bit, and good luck!