Regarding changing the cylinder cover gasket.
For what it's worth:
The BMW manual specify reuse of the gasket, but replace if damaged.
Some dealer apparently change the gasket every time. If I should make a educated guess to why, this gasket is the same type that was first introduced on the K1200S (not sure if the first R1200 has one as well). On the K12 there are two half-moon shaped recess cutouts in the head in order to slide the camshaft in, and there are two half-moon shaped bumps on the gasket to fill them. You had to seal the corners of these bumps with grey silicone sealer. This sealer was time consuming to remove, so it was cheaper to replace the gasket than to clean it, unless you did a DIY jobb. On the 1200LC there is need for time consuming cleaning, but I guess it's an old habit by some… (but I may be wrong…)