I'm wondering what kind of sight picture you see when using a gun with a mid bead in addition to the muzzle bead. I've always lined them up on the barrel, where the mid bead is partially covering the end bead. I was reading a trap book last night and it said the ivory bead should be aligned on top of the mid bead for proper sight picture. I'm sure there is variance here, but curious as to what others do. Thank you.