By now everyone knows I have a grappling man crush on Dean Lister and I've stated many times that I think he is by far the best active grappler in the world. He's a scary dude on the mat, master of many languages and holds no qualms when talking about cross training in other grappling arts.
Check out Dean's recent seminar in Italy at Accademia Kama Seregno Dean details an arm drag variation that opens up all sorts of limb destroying goodies. Have your pick amongst a variety of moves including taking the back, hammer lock, bent shoulder lock, straight arm bar, and way to many more to list. So listen to Dean, he knows what he's doing regardless of what language you speak, and in our case it's the language of grappling.