From what I'm reading is that Item #3 on page 4 of the Parts List, Part # 244027 MEMBRANE, SWITCH CONTROL DYNASTY 200 DX is all that needs replacing to get the features of the DX.
Dynasty 200's with a build year of 2009/2010 and newer, the part lists for $109.80 at Miller4Less. This same part though for Dynasty 200's that are older costs much, much more though.
