Flip Part but not Fixture

Flip Part but not Fixture

I have imported CAD which contains both my locating fixture and the part to measure.

I now need to flip the part upside down on the fixture and measure the rest of the part  features.
when I do the Move Part CMM-M of course moves my whole CAD so the fixture ends up flipped as well.

Is there a way to select only the CAD faces of the part to move and not the faces of my fixture??