I don't have a brooks, but do have Selle SMP which has the same hammock concept. I have found that the nose and tail should be set level as a starting point, then it must be tweaked to ensure comfort in all positions (as in the drops). There is a fine line between maintaining the concept of sitting "in the saddle" (hammock) and ensuring you have no pressure from the nose in the drops. Everyone is a little different, so the degree of perceived tilt will be a little different (assumption is that bike fit is correct to start off).