I've completed linking the arrangements to one another (e.g. Delicado 1st arr. relates to 2nd arr. and vice versa). I may have gone overboard on a couple, such as The Oscar, but overall I find the cross reference useful.
However, when I got to Nick Perito's recording of The Shadow Of Your Smile, I couldn't find an original by Percy to connect it to. Did Percy ever make a recording of that song? I haven't come across it yet.
Should you come across any that I may have missed, please let me know.