Thanks everyone for the great suggestions!
And, yes, I got the Channel Blur to work, but it’s not a straight forward process. If you blur just the alpha channel, but the R,G, & B channels are not blurred, it won’t create a soft edge because RGB channels are still “hard”. But if you blur all color channels and alpha, it works, but the entire image is blurry at that point and you’ll need to dup the layer and do a matte choker or some other technique on a top layer.
Best regards,
Kevin Camin