Topband: Beverages sharing supports?

[Alan Benoit]

Sorry for the possibly newby question, but I can't seem to find an answer to this in the ON4UN book or the archives:
 
Can 2 seperate beverages (seperate feedlines, seperate transformers, seperate ground rods) share the same supports?  I have a 585' NE beverage I recently put up that uses 5' steel conduit supports with PVC pipe insulators at the top (~ 7' height).  I have cut slits at the top of the PVC pipes and run the wire through those.  
 
Could I drill a hole in the PVCs about a foot vertical down from the current wire and run another wire through these as an independent SW beverage without excessive coupling of the antennas?
 
Thanks in advance for your replies.
 
73,
Alan, WQ5W