Mostly a logic puzzle, so shouldn't be too difficult. Nonetheless here is a movie of the solution. Spoiler: Movie Thanks to @gmacpro and @Don G Rowe for pointing out a shortcut. The level now comes with two nice flags mounted on the building.
5 stars for the creator and the Kreator! I was a little hesitant on this one as I first solved it by forcing Motor R inside the gap, so it ruined the surprise for me when I watched the intended solution. So I had to leave it for a while, and replay it imagining what it would be like if I did it the right way in the first place. Fun concept overall Spoiler: But...... Why is R's motor head darkened when it's chopped off? Stained with black blood?
Incredible level of logic/cooperation ... at first I did it as @cpw (jajajaja, I'm a cheater) but I knew it was not your intended solution because I did not use many elements .... Then, I started thinking and Voila !!! Funny and challenging !!! Thanks @Block builder