The helmet is going to be part of the equation not an after thought. What lid did you choose and pics with it on. Provided you don't have any back issues(you can see the gnarly scar on your knee so more issues could be present) you need to get further out and lower, much lower. While most people will never TT like fabian there are position tips to take from the photo. Low, Flat and his head is at a funny angle but usually the tip of the helmet is on his back.