Softie,
Thank you for that.
The UOR was indeed an 'quick fix' to get us south, but there were NO changes to the fuel gallery or system at that time (other than to allow the two AAR pipes to feed into each wing, as far as I can recall.
Didn't MOD 715 purely 'hide' the pipes that ran through the cabin? I don't recall it actually 'changing' the fuel system at all, merely 'tidying it up' a bit. However, if it did, then I will bow to your knowledge.
The Winco