The Eduard does have the advantage over the Airscale in that I suspect it will be an easier upgrade. The Airscale is excellent, but fiddly, and the Engineers panel is tricky to paint (well, it was for me!). Horses for courses, really - the Eduard will likely get you a better pit than OOB more quickly /less effort than Airscale, but the 3D of the Airscale looks better to these eyes. Also easier to distress and blend in with the rest of the environment. Well, that's my £0.02...