How do I get configurations of parts to reflect the changing dimensions of an assembly?

Hello.

I have an assembly composed of 3 key parts. 1 connector (configurations in shape) 1 rod (configurations in length and tabs) and 1 panel that slots between the rods joined by a connector. What I would like to know if there is a way for the panel to automatically adjust to size determined by the interaction of the connector and the rod. For example if the rods and connectors form a number of cavities is there a way for me to make one panel that could fit within them all even if they are of different sizes.

Also, for the rod part. Is there a way for me to specify the desired length of any number of inches before inserting it into an assembly? I seem to have difficulties with this in the configurations publisher.

Thank you so much

SolidworksConfigurations design Tables