https://www.harborfreight.com/electric-chainsaw-sharpener-63803.html
Got me one of these about a decade ago, slicker than cat shizz. Totally adjustable to whatever angle your saw requires, takes almost no time and I'm still on my first sharpening stone. Just cant use it in the field. I usually take an extra sharpened chain with me and sharpen what I need when the day is done.