Math functions using alternate units.

 From:  DannyT (DANTAS)
7213.1 
Hi Michael,

I'm modelling something that requires a mixture of metric and imperial components, I'm modelling with metric units and when wanting an imperial unit I input something like 0.438" however when using a math function, e.g. 0.438"/2 MoI is not happy and just sits there with a vague look ;) any ideas?

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~Danny~