Hoping you people can help me out here. I've acquired an 3D model from a supplier online of a gauge we use in both IGES & STEP formats. We need to give our customer drawings of all parts which basically show over all dimensions and weights. The gauges we buy have the dials printed with our company logo and not the suppliers, however the CAD models come with their logo. Obviously we don't really want our customer bypassing us and going to our supplier for replacements (we calibrate and test the gauges prior to shipping out to ensure our product runs correctly). If I bring the part as supplied into a drawing, everything is fine (First image), but if I try to modify the model in a bid to lose the suppliers logo all I get in the drawing is the features I've created (Second Image).

I'm probably missing the obvious embarrassingly but I'd appreciate any thoughts/help.