I successfully ran my 2011 Day One 10spd, used a problem solver hanger (not the chain tug one, universal from memory) and Shimano 105 rear derailleur, just had to adjust the stop limits as the hanger sits outside the dropouts, ran perfectly the whole time I had it.
I successfully ran my 2011 Day One 10spd, used a problem solver hanger (not the chain tug one, universal from memory) and Shimano 105 rear derailleur, just had to adjust the stop limits as the hanger sits outside the dropouts, ran perfectly the whole time I had it.