https://www.youtube.com/watch?v=5Vn3Qdu70Wk
I used the RSW version of longship Deva Slayer, No Remorse, Giant Silvia and a nagamaki that has yet to be made in real sword version, against an senior student who was wielding a Deva Slayer modified to have some curvature. During the bout he was learning how to use DS correctly.