do you have more pictures of the piping please. How did you solve it with the fuel pumps? Do you have a BMW 1M pump, one or two(one for each side of saddle). If 2 how did you solve the steering of the 2nd pump, when and how does she know that 1 saddle is empty. Do you use the original fuelmeter gauge or do you have a separate one?
Sorry lot of questions but you are the only one worldwide that have done this. If it would be the other side of the world, I would been in the next plane or driving to have a personal look at what you did but that isn't possible.