Thanks a lot, Box! Yes you can! But... I created 4 simple objects, added different colours and created a comoponent. I deleted one or several objects, and I was able to purge two materials. But always the one I added last its material will not be purged. This has to be removed manually. The problem is we have a hell of lot of components in our projects which are mostly downloaded from the warehouse (we are restaurantdesigners). This means a lot of mess, most of the materials are not labeled or purged before. It would help to know which objects are (were) assigned to the material. A plugin would help! Regards Picky

Okay. SOLVED! It took me quite a while to find out how the system works according to Dave's proposal: To multiply the whole grid means you have to multiply floor AND furniture as well. I was stuck thinking of nesting the furniture in the floor component...And yes, you have to make a fix size of the furniture by inserting "=" followed by the values of the axis. Keep in mind when you work in a metric system you have to erase the complete unit (i.e. "cm" for example). Not necessesary in inches. Last question: How can you set this blog to solved? Picky