I don't know if the original coders are still around at FoD. There have been a lot of good suggestions, but few, if any, are implemented.
Jon, this is a good idea and I suspect might be easiest to implement by allowing a "do-over" for the previous shot. All you would have to do from a coding standpoint is to save the current state variables and reload them each time. Probably easier than writing new drag and drop code. This would allow us to set up a shot and practice it repeatedly.
As an aside, that would be great to have as an in-game feature, if both players agreed to any given shot. It would solve the accidental click shots that die before the hog.