what stones are needed? i always freehand and get working edge. grew up with japanese wet stone, and that's all i knew. now i don't have one and i didn't know they were that expensive. always used kitchen sharpening steel to get working edge and it worked. it's not pretty, but knives i have will cut. but that thing is rather pain to carry around. i'm thinking about some sort of field sharpening stone or two. what is suggestion? i'm going to hold the knife and move the stone. so stone should be small and easy to carry.