Upload & Sell: Off
Ben, MKII is the one that passed final QA test then again, recertified by Canon service senter whenever user send it in.
I'd vouch for that comment; my 50L travelled to Canon three times (out of warranty) but the third time it came back, the thing was a damned gem of a lens.
Then, it was stolen :\
It now lives in somewhere in Russia, probably churning out first-rate images of second-rate mistresses of third-rate Russian oil oligarchs.
(I apologize in advance to Snopchenko and World in Lens for the stereotypes)