It really doesn't take a lot of fletching to guide the arrow if the arrow is spined pretty close. I shot 3) 3" feathers a lot with my lighter bows. When I would switch to the hunting rig I would shoot 3) 4" Feathers and never had any issues. Only time I experimented with 2 fletch was when I shot one of the 3 off......lol. Interestingly they would shoot right with the group of fully fletched arrows.
