That's fine, although a lot of my point was based on Sigurd's prior movement. If they were fighting face to face a strike to the side of the sword would be highly effective, but at a diagnol more of the thrusts forward power would negate the incoming pressure. 

Also, we are talking about a three foot longsword. Somewhere along the line the distances probably got messed up, but Sigurd's arm is by no means fully extended. It wouldn't need to be.