[Christ]

That clay model you made, almost perfectly resembles the "Rifle" body that Vetter sells.

My suggestion to aide in your 125MPG goal would be replacing your lights with LED versions. Of course, if you use the stock lights that hang out in the wind, it will completely ruin your aero... :P

I don't think a funtional backrest would do you any good, really. Seems like you're still slightly leaning forward in that pic, so unless the backrest was further forward than it needed to be, you'd never contact it anyway. Your back is slightly arched toward the thoracic vertebra, so the lumbar area could benefit, slightly.