Most of the hardware I have implemented is through hardware arrays, so this option would really be beneficial for us.  It would allow us to use 1 drawing for several different hardware allocations.  The drawing library we maintain would be able to decrease significantly.  Since the arrays are called "Associative HWR Arrays", I had hopes that these "Associative" drawings would work, but it was confirmed in an MV ticket that they are not programmed to.

As a side-note, below I pasted my notes in red on this snip that I got from the MV Knowledge Base, as it was missing the bit about the extension, which had me confused when trying to use these drawings.