Electrical tape sticky side up? Nah, mount the barrel band just tight enough to stay on, surround with "no-residue" masking tape, remove barrel band, then apply light coat of contact cement meant for leather work to barrel and inside of barrel band. When cement is dry to touch, carefully put back on and tighten screws. Don't forget the lock-tite. Mine haven't slipped in over 8 years.
Keyman (non sibi sed patriae)