Currently if you uncheck this box, the product will not be moved, or resized.  But it WILL be redrawn.  This can in some cases require an elevation to be completely deleted and have to be redrawn from scratch.  Either because MV has for some reason decided the products are now scattered all over the drawing, or because they have had to be modified on the elevation to reflect the design.  So please if we tell it not to include the product, make MV do absolutely nothing to that product.