JMHO, mind you but this little mod isn't worth the effort, at least, on my R53 it's not. The amount of adjustment is miniscule because too much adjustment and your clutch safety switch will keep you from starting your car. It is a good idea, however, to check the OEM rubber stop and, if it's "tired" or disintegrating, replace it with a similar one found on the "help" aisle of your favorite auto store.

__________________

 

Had that issue on my BMW 540i. Solved by gluing on a piece of rubber to initiate the switch at an earlier point.