Just a quick tip, when importing a skeletal mesh or reimporting one, make sure it’s in A-Pose or T-Pose. Correct me if I’m wrong, but I found out today that the pose in which a skeletal mesh is set in affects the animation that is connected to that skeletal mesh. In my case I imported a skeletal mesh in a left swing pose, and it impacted the weight painting of my right swing and made the character deform in a bad way. Not sure if this is already generally known, but it wasn’t to me, so I’m posting this just in case it helps someone out.