I've posted this bike elsewhere but thought it would make a good update to this thread as it demonstrate the max stem height one can achieve with an uncut innicycle headset. The Cannondale below has a 40mm clamp height stem and 50mm of spacers below it, using up every available millimeter of steerer tube on the quill portion. The resulting hood and drop heights are very similar to the original bike fitted a quill stem at its max height (see pic below for original bike as purchased).
