Pictures were requested, so here are the first couple.
This is the Hepco & Becker rack and 40-liter top case. The photos make it look larger than it really is on the bike. Only one installation glitch: I unexpectedly had to remove the fender in order to mount the rack. Not a major inconvenience, just not mentioned in the instructions.
I have the 30-liter side cases, but no mounts for them, yet. Working on that...