Yeh PJ but what is the point? It may increase your comfort
level but in pragmatic terms offsets don't do zip. Besides I
keep getting the bloody crap knock out of me during Winter
by heavy wake in strong Westerlies, whenever I'm flying a
northerly track and offset right, by a wide body 4 or 6 miles
to my left. Coffee gets spilt all over the flight plan so damn
often I just request up to a further 10nm offset sometimes
depending on the wind. This does not happen anywhere else
as everyone's on track.
And I've never encountered any aircraft flying off their levels.
Even lousy rotten outfits that I could easily name have their
crews prepared for China's SLOPpy RVSM procedures.