140mm max till 2010.
Then 150mm max, RLT Ti and dual flow on dual air & uturn ( would probably avoid the uturns now though as getting a bit flackey)
2012 DNA compression damper and dual flow rebound (all models) still dual air but now Dual position travel adjust model too.
2013 DNA still but solo air fix travel.
2014 same.
2015 Black stantions, air token compatible top cap (retro fit kits for 2013&2014 available though) and rebound went to rapid recovery (very little different performance wise from dual flow.
Currently running some 2015 29er RCT3, with SKF wipers and different oil in. Have adjust air volume with Tokens & they are very good, so much so I’m not looking to replace them for a while now 😀