Fantastic - many thanks.

IIRC if there is an image node for the bump map, but there is no bump map specified in the original shader, VSS would add a noise node instead of the image node, correct?  Is there a way to override that in case I don't want any bump?

I'm probably going to use Matmatic to build my templates, so the process would be: write the Matmatic code for my template using the appropriate node names, generate the material file,
create the new template, then load the material file into the template.  Seems way to easy.