I am by no means an expert on any of this, but I do know that different metals need different angles to be sharp. I have the sharpening kit from Smiths which Ken recommended. It works great. If you use the guides, you have two choices for angles and if you are able to freehand your knife on the sharpeners, you can pick any angle you would like. My filet knives and skinning knives are sharp and work great.
2 cents offered.
