I'm old enough to have used panniers that strapped on the rack. My QR Ortliebs definitely make me faster in that regard. I even bought the rack system for my Carradice saddlebag for that exact reason.

Come on mattiasthegreat, you've now started three threads on this same subject. Isn't it about the time you start giving something back? What kind of design do you have in mind?

--J