But I am awaiting my R1b-M343 Backbone SNP Pack test results.
And it is probable that I'm some basal clade of L21 (see my "R1b subclade prediction" thread). So maybe I am the "missing link" in your "L11 from the Steppe" theory, and I will confirm that L11 is from Yamnaya? Maybe I'm descended from a disobedient Yamnaya warrior, who did not listen to his chieftain's order that all of L21 should go to Britain and none of them should stay in continental Europe.
And as we know Yamnaya were better at predicting SNPs than FTDNA. They segregated themselves according to subclades. "U106 go to the northern land where the ice prevails, P312(xL21) go to warm territories where 72 Basque virgins with nice Beaker pots full of alcohol await, and L21 - you the damned stock, you are doomed to stay where there is always rain, in cloudy British Isles far away".
Said the SNP-predicting Shaman of the Yamnaya culture...
