Please don’t, the MoFi disc ( I have one ) relies on visual alignment of the disc to the pivot point Or plane on the Arm - something not obvious on all designs and the sighting blade is dark wide and a source of lack of precision- use it in a pinch.
A decent $40 tool but hardly up to snuff for the investment you have already made.
A decent $40 tool but hardly up to snuff for the investment you have already made.