A tip about flat grinding.
Watch your grinder sparks. Dont specifically concentrate on them, but watch them to make sure they are even. The sparks are coming from the part of the belt and blade that's being cut. Use new belts the closer you get to the final few passes. If the sparks are even your blade is flat and it cant help but give you a flat grind.
I know there is much more to it than that, but that can speed up the process.
By the way, nice knife and grind.
Lin