X11 forward root over SSH

[Waldher, Travis R]

I have an install routine that brings up a GUI, the routine of course requires root access to do the work.

I can SSH in to a box using my credentials, su to root, but X11 is blocking transmission back to my computer because I am root.
X connection to localhost:11.0 broken (explicit kill or server shutdown).

Is there a way to get a root owned X window to pop up, WITHOUT having access to the Xauthority file associated with my userid that I used to initially login to the system?  (home directory is NFS mounted, no root access)

Thanks
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