The side panel badges on my 550 were both missing one of the little plastic pins that attach them to the side panels. After considering what repair scheme I could use I opted for a glue on replacement. It is made of aluminium has an M3 thread and a large diameter head which has a 0.025mm (0.010") thickness, which will sit below the outer border of the badge. Using the side panel as a jig the pin was bonded in place with Gorilla glue (polyurethane) Not being too keen on using the clutch washers again as they will destroy the pins with any subsequent removal I ran an M3 die down the other pins so I could use nuts to hold the badges in place. As the original clutch washers would not tighten, only hold the badges in place it just a matter of "torqueing" the nuts down until there is no gap and presto! This repair would also allow future removal of the badges without risk of damage.