yeah, and the way I have it coded it wouldn't be obsenely hard to do, but the more I think about it the more I realse that as cool as that might be I don't think it would be very useful, how oftine do you need to edit just the radius of a thruster, usualy it's best to have all the information at hand. I think makeing it so that selecting a data element places the curser into the relivent control will have the same effect without hideing useful information from you, and the most important thing about the tree will be the drag and drop ability to move nodes around at will, and copy data of the same type.