Great stuff Gord, I'll be using some of those tips myself.

One thing I've noticed with 1/2 to 3/4 shots is that it's easy to lose discipline in the set-up and swing. Apart from keeping my weight more on my front front and the ball a tad further back in the stance, I use the same routine and swing (albeit a little steeper) that I use with every other club in the bag (putter aside). From the problems you are having with one particular shot, it would seem to me that you are swinging very differently with these shots. Use the same technique that works for full shots and then all you should need to do is to adjust your coordination to adjust for the shorter swing.

Hope this helps.

Paul