Wing plans

My current plan is to build a true Wharram Softwing rig. However, I often catch myself dreaming up some modifications for it. First, because I'd like to mave a mast which is as short as possible. But I want a high aspect rig. Both items are a bit incompatible. Which is why I keep pondering the possibility to have Wharrams top yard a bit longer and steeper, but still equip the whole thing with a fat top main. Just as if the top part were a windsurfer rig.