" You can feather the edge of the cut to blend it."

David,

How would you suggest to feather the edge? My process is to take the contour marked on the plexi-glass and cut a cardboard mask that will fit in my Cokin holder. Then carefully line up the edge of the mask while looking through the stoped down lens. I then make my two exposures on the same frame. Feathering the edge would make lining up things a little less critical. As it is now the process makes the ultimate hard edge, and allignment has to be bang on.

Any suggestions would be appreciated.
Thanks