I use multiple behaviors stacked/applied to groups all the time. It's especially useful for coordinate transformations as well. For example, if you want to make a fan with a bunch blades all canted at a specific angle, you can; 1.) Make the blade. 2.) Orient it at the canted angle. 3.) Group it which resets the coordinates with a frame of reference with no rotation. 4.) Move the hotpoint to the base of the fan blade. 5.) Rotate the fan blade the number of degrees equal to 360 divided by the number of fan blades. 6.) Duplicate until you have what you want. Grouping and modifying can save LOTS of time! -Kix

-Kix