Thanks Gil and Keith , Gil your gif shows what i want it to do but only on one model, not across all the models.
(Though i must point out i did that whilst playing around and found it worked a treat actually.)
Anyways thanks for replies and will work with it at node level
Cheers Boof63
PS if work at node level , is there away to show you have an effect at the node level show up at the model level, so you know quickly
Thanks again