I haven't done it for a while so I'm not totally sure if the option still exists but, You can select the option to move one object until it touches the other. If all your 50 objects are supposed to touch a single plane, you can, 1.) Set all groups at the same elevation (like 10.000). 2.) Group all 50 objects. 3.) Use the align tool to drop the group onto the plane by selecting the contact option. -Kix

-Kix