Schneider - many, many, many EK 777 F/Os went from R to L on 777.. Just wanted to clarify that! And the 330/340 F/Os upgrade on 330 and then 6 months later requalify for 340 - and that's the minimum wait for CCQ requirements..
In fact it's been known for 330 F/Os to do transition upgrade onto 777 and the other way around depending on the company requirements...