AutoCAD Civil 3D :: Smart Structure Pipe Scales And Xref

We set up our projects with a Topo sheet, a separate Design sheet, then a plot sheet with the drawing referenced in.  The design sheet consist of basically all the design information unless this is a larger project, then the design components are given their own drawing file.  Pretty industry standard, right?

 The problem we are having is that the symbols are not scaling correctly for the plot sheets.  I did some testing and the topo sheets are working as expected, but the "smart" pipes and structures are not from the design sheets.  For the structures we are using a block for the plan view, and that is using the current drawing scale for the symbol size.  But that is not carrying over to the plot sheet or viewport scale, it is locked to the scale of the saved Design drawing.  So when plotting the project, half way through, people have to open the design drawing, change scale and resave to get the structures the right size for that sheet.

Do I have the structure style setup wrong?  Shouldn't the symbol change to the plot sheets current view scale like a survey point?

I have played with making that plan block annotative but Civil 3D doesn't see a annotative block in the definition of a style.

I don't think that the network should have to be native to each plot sheet, but the only work around I have is to dataref the network into each plot sheet, and then have to freeze the xref's layers so there are not doubles.