Hi all.
 
	I just saw this video and gave the trays a try.  It seems the whole tray/memory feature does not work if you are using nodes on a shot, for a plug in or whatever reason you are using nodes, scratch will not pass the node tree from one shot to another.  I don´t know if I am doing it wrong or if it is a software limitation, but it sure is a pain to recreate a node structure manually.