[vtkusers] combining sources?

[Tim Newsham]

Hi,
   I have several pipelines like:

   sphere source -> polymapper -> follower -> renderer

this seems quite wasteful (especially recomputing the follower
matrix each time).  All the followers are tied to the same camera
and share the same position.  I would like to somehow combine the 
input sources so that I can use a single follower.  Is there any way to 
take multiple polydata sources and send them to the same polymapper, or 
multiple mappers and send them to the same follower?

Tim N.