Compatible with my 105 sti levers?

Just wondering if a Dura Ace 7900 rear mech would work with my 105 5600 levers?
If not would a Dura Ace 7800 work? I have been offered ultegra 6600 sl groupset minus levers also so would that also work?
Many thanks
If not would a Dura Ace 7800 work? I have been offered ultegra 6600 sl groupset minus levers also so would that also work?
Many thanks
Contact matt at bikeradar dot com please
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2010 Giant Defy Advanced
2016 Boardman Pro 29er
2016 Pinnacle Lithium 4
2017 Canondale Supersix Evo
They'll all work fine.
Thanks again
Is it not time you were in touch re: missing items that you have offered to sell on this site?
You'll have a broken one if I catch up with you!