With my Jo-Jans, I get a hen feather straight down if I go right wing for a left hand bow or a left wing for a right hand bow. With wood arrows, i rotate the nock 1/8 turn from square with the grain, fletch, and then rotate the shaft 1/8 turn to rotate the offending hen feather into the corner and realign to the arrow grain. Counter clockwise turns with left wing and clockwise turns with right wing. This splits the difference and I can then shoot either wing left or right handed without scarfing my bow finger too often. For many years I fletched right wing for my right hand bows, that put the bottom hen feather at an angle in and the top hen feather straight up. However, I also hand a scab on my left hand index fingerer 30 years. I like to feel the arrow slide on my index finger until it touches the back of the broad head when shooting ASLs. Not every arrow nicked my finger, but even though I did what I could to soften the edge, I did manage contact often enough freshen up the feather bone cut.