I am planning to replace the rear disc brake disc on my 96 R1100RT. It was suggested by the person I bought the disc from that I should replace all the bolts with new ones when I did that. The manuals I have, including the BMW one, don't seem to indicate that both replacement is necessary. Are they stretch bolts as used on parts of the clutch assembly? What's the general consensus on the idea of complete bolt replacement for the disc?