Z arm weight tolerances/holding torque

What weight tolerances on the Z arm should we respect? notice my language choice as I often “abuse” my variables :slight_smile: .
The holding torque looks to be 4.4Lb I should be fine with less than 450G of additional weight but then there are a number of other items contributing, cabling, arm extrusion,stepper, utm etc…

  1. for the arm
  2. the tool / 3 magnets

debating to mount above the UTM or engineer a tool w custom pinouts…

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Less than 450 you should be fine. Go with the easy option of mounting above the UTM.