I've read some of the background on the Thousand Sons, and there is some conflicting info I am coming across. First off the color of the armor, I've seen refrences stating this happened when the Ruberic was cast, other places suggest Ahriman has been changing the color of the armor when he takes over a new Cabal. So is it reasonable to say that there are some warbands out there that keep their original coloring to honor their Primarch?
Secondy: Head crests, in a pre Hersey galaxy only CO's and NCO's seemed to have them, the rank and file marine sis not. So what changed? Are all chaos Thousand Sons marines now sporting these head crests? Seems to me that only Aspiring Champions, Sorcerers, Chosen, and Terminators would have them.
Thirdly: Given the point of the Ruberic, would the armor of the Thousand sons have warped into 'Chaos Armor'? All the arrows, spikey bits, and skulls? Or shouldn't the armor have maintained it's original look that it had 'pre-hersey'?