Thx, but I don't understand what you mean by "skin". Could you explain that a little bit deeper?
I found this topic about different player skins. But the answer there encourages exactly my current approach, i.e. having one sprite with 12 different animations and select them by string concatenation.
No, I didn't follow this tutorial, because I only had the free licence, when learning construct (i.e. the sprites where not available). I just browsed it, but couldn't see anything about your skin approach.