I could use some guidance. I have a Ranger RD7....a beast. I need to do some reprofiling towards the tip of the blade as it is way too obtuse to take an edge. I'm scared chitless to try any 'freehanding' with this blade, as all past attempts with other blades have ended up in the scrap heap. I can't justify the $150 expense of an EP Apex, and was looking at either a Lansky or Gatco system. Will either of these two "lesser" systems be able to handle, or even work on a blade of this size? What about the "Sharpmaker" for this task? Any advice would be appreciated.