If you bareshaft tune, adding the weight of feathers and glue to the back of the shaft will stiffen it some, so it would be good to leave the bareshaft slightly weak. I compensate for this by fletching my bareshaft, and then cutting the feathers back to the quill. This does a pretty good job, but the quill and the tiny amount of feathers that were not cut off does still guide the bare shaft to some degree, so it straightens out after about 20 yards unless the tuning is way out of whack. This means that my bareshaft tuning only really valid out to about 15 yards, and longer than that is really just for show. I’ve read that some people will cut off a length of electrical tape that weighs the same as the feathers and glue, and then wrap it around the back of the shaft. I would imagine the electrical tape is flat enough that it doesn’t guide the arrow at all, and is probably a better idea than cutting the feathers back to the quill.