[Harp-L] "Take the A Train" Question

[robert <harpbob@xxxxxxxxxxx>]

There was a discussion here a while back about playing the head of "Take the A Train."
Anyway, I have been struggling for quite some time to play this darn thing fluidly and make it swing...I've tried corner switching and I've tried pucker, and I've tried mixing the two; I continue to practice all those but I seem to be stuck and I'm not happy with the way I play it. Anybody have any suggestions?
WVa Bob
P.S. I've moved it through all 12 keys and it's  easier to play it in certain other keys, but one needs to be able to play it in the key it was written in, C.