Sounds like you are on the right track. Just remember it's not an exact science. They may show weak but it could be leading you down the wrong rabbit hole. That's half the fun of traditional IMO. Experimenting and finding what works.
One other trick I almost forgot about; Get a can or 2 of the spray on white foot powder. Spray the back of your arrow including your fletch up to maybe 6" in front of the fletch. Let it dry and then shoot it. Anywhere it contacts the bow will leave a white mark on the bow and rub off on the arrow. Just make sure not to over do it on the spray or you end up with a cloud of foot powder in your face. Ask me how I know.
Oh and if you are right handed the LW feathers may make all the difference. I missed that in your first post.
Good luck!
