Would someone please clarify for me the exact (in mm or inches) size of the factory door hinge nuts on an S1 Europa? Searching through these pages I see 1-1/8", 28mm, 30mm and so on. Please see diagram. Is "A." the same dimension as "B." ? I see some people are mixing and matching their custom made wrenches with a 30mm for A and a 1-1/8" (29mm) for B. Thank you.