Ok, guys, I have a solution if anyone else needs it. Legal and without tricks.
- Open the original animation. Look at its duration on the graph.
- Then, in Montage, select this animation and in the Animation Segment tab set the End Time equal to the duration of the original animation.
Now Montage = source. Profit!
2.1) Regarding Blend Out Time: a situational thing, for short animations - as in my case - it is better to set zero. As I understand it - this is the amount of time that the animation will lose when returning to Animation Blueprint. I may be wrong, do not believe me
