Dock Station on new W520

[rcepek]

So once again, looks like Lenovo changed the specs on the Docking Station again!, I'm hoping that I can use the existing docking stations and just upgrade to the PS from 135W to the 170W. Can anyone confirm that the base Docking Station for the new W520 series (433830U) is the same as the (433820U) just with a different PS?

[Harryc]

They are the same except for the power supplies. In fact the 4338-10U is also the same but comes with a 90W Power Supply.