My apologies for a misconception. Point taken. I was hoping to use flash at high shutter speeds while having some flexibility with aperture. I was using easy ISO, shutter speed in excess of 1/1000th, ISO 100, with the variables being ISO and aperture. I wanted to reduce those variables to aperture alone. Clearly that is not feasible. I understand others want this functionality as well, hence a solution to a desire. Not a solution to something broken.