I'm still having some issues with uploading video - unfortunately, the longer clips are too big, and they're the ones that show the most.
Kellie asked if I thought the adjustment had helped Sunny - I think so. He's definitely taking both leads out running loose. And even though he's still not taking the left lead as readily under saddle, that's always been his stiffer side. If I remember to be deliberate and consistent with how I cue him he's taking the left lead correctly again. And he's back to flexing his neck both ways and stepping across underneath himself easily, so... on the whole I'd have to say, yes :)