Mod: Kleines Update
I think the problem is, that your 550 would like to be similar to the SFM's 770. The 550 is much older construction than the 770. So the colour of the 550 isn't correct! That would be nice that the 550's green colour seems to be washed out...But overall it will be a nice mod.

Mod: Es gibt Probleme und diese werden gelöst
Look at that machine, and compare with yours...The back tires are the best on theese pictures...Could you make similar ones? That would be very very nice....
http://www.technikboerse.com/en/view/second-hand-machine/combines/1145377/claas-lexion-550.html

Mod: Es gibt Probleme und diese werden gelöst
I think it is too dark...Look at a real picture, its much more lighter green, and the claas branding, and the wheels are similar to orange, not dark red...correct it..