I have some small stones that work pretty well for re-curves that aren't tight, like the rajah 2 by cold steel. But I'm not prepared to fix chips or anything else on something like a zt 0350. I've heard about slip stones, and rods, and fixed position machines. I dont care for machines, as I'm pretty successful doing it by hand. What are some tools to look at and buy for doing recurve knives by hand?