I recently decided on a Buck Strider 889 as a folding bushcraft knife. I am aware of the pluses and minuses of folding vs. fixed, but now i would like your opinions to what is best suited for survival bushcraft? This differs from standard bushcraft because I need to take into account the ability to sharpen serrations with minimal supplies. Has anyone experience with sharpening serrations on sandstone? it has been suggested that if scrapped on soft stone, the serrations will "groove" the rock, and suffice to bring a functional edge back. All opinions welcome!