Yep, RTL's D11R's.
I have seen these machines, though not fully equipped. One of them got traded and now work's at Issac Plains mine in QLD (AUS) (under Cooks Constructions)
My boss at work, talked CAT into making a large coal blade for the D11R equipped with a 5 shank ripper tyne.
I have seen the original plans and designs of it. These blades were the largest blade ever made (at the time) by CAT.
There are 5 of these in the Latrobe Valley. I think there is another one in the wind. All these machines have GPS.
The only problems I hear the D11R's have, is broken head bolts and something about the hot exhaust manifolds.