I'm working on a damascus, Oakeshott XII sword that calls for a fuller 3/4's of the way down the blade.
In the past I have struggled with grinding straight sword fullers on double edged weapons. The biggest challenge I've had is ensuring that the depth of the fuller is uniform. If a fuller is of uneven depth then it creates uneven, wavy grind lines. I experienced this first hand when I worked on Ealdric.
So, I've been scratching my head for a while on