Nice pics Steve! That pair started life as Exile 2PT SULs and were later converted to modded UL prototypes with P100 frames. One then had its LE and nose replaced as the final Std prototype with an all Nitro frame. You can tell the Std is in the back with a narrower nose, straighter LE and full size upper APA connectors.
Those are the only two sails now with that layout. I still have one set of the early builds and the rest have all been retired.
Thanks for posting.