I am updating drawings for a customer and they want my units flipped from inch to mm as the primary units.

This is easy to control in the options > document properties > units, however most of my dimensions flipped, but some are not

which means you would have to re-dimension that particular dimension.  I can filter the dimensions and window them, but I need

to change all of these dimensions to be mm primary and inch secondary. 

Does anybody have any suggestions on how to select the dimensions that aren't flipping and do it as one step?