Grannyknot, you do not say what it is about your flies that displeases you, so it is hard to suggest a fix. I doubt the trout would care, but you do not want to trim those feathers. If you do you will have a wing that looks blunt at the tips. I'm thinking that your problem may have to do with the selection of the feathers or the quality of the feather. You may also be having thread tension problems causing the feather on one side or the other to not mount properly. Regards, Silvercreek
"Here fishy fishy."