Many thanks for the pix, really helpful. I might consider moving the tilt mech an inch or so forward, so that it fully engages on the flat piece of the bar. I shouldn't have to do this and it does annoy the hell out of me that Givi are still marketing the Alaska's as fully compatible with the QD rack on the GS, whilst at the same time writing to customers to say that they aren't - bizzaro!. I guess it it what it is and Givi don't seem bothered. My tilting mech looks less engaged with the rack that yours, but that can't be the case, as these things should be identical, and I don't think you have an earlier version of the rack. Pix of mine attached, the bike is filthy as I got back to Suffolk from a weekend in Wales last night and the weather was pretty dire. As an aside, I met a guy in the M6 services near Birmingham, riding a three day old GSA. An old lady had backed into him in the car park, smashing his number plate and knocking his phone out of his hand, which a passing car promptly ran over (this was his nav device). Always someone worse off than yourself I guess :-/. Thanks again for your help, much appreciated.