I currently have a Lansky bracket clamp sharpener with 5 different stones. The lowest angle it will sharpen to is 17 degrees. I just bought a Spyderco Para Military in D2 and I believe that the edge angle is 15 Degrees from the factory. I use the knife for carving and would like to keep it as sharp possible. Should I get a Sharpmaker to maintain the 15 degree angle or are there other options such as a stone?