Starting to beef up on my sharpening equipment as I'd like to get better, but have a few questions about maintenance... Is it safe/advisable to use a standard Naniwa stone fixer to flatten stones that range from 400 to 6000 grit, or is it better to use an Atoma plate (400?) to flatten the higher grit stones? Is there any danger in using the same stone fixer for both synthetic and natural stones? What about using the same nagura to clean/prep both synthetic and natural? For reference, I have a small handful of synthetics (4), and one small Takeda natural stone (~$60). Separately, I find it damn near impossible to sharpen the left side of the knife without switching hands. Would I be developing a terribly bad habit if I continue sharpening by swapping hands for each side? I just can't seem to maintain the angle on the left side when the knife is in my right hand -- I wobble too much, have little control over pressure, and I inevitably dig the edge into the stone! I can get a reasonable good edge when I hold the knife in my left hand, but I don't want to develop bad habits now that I'll have to correct later. Any advice would be greatly appreciated!