You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The multi-magnet mounts do increase the capacitive coupling to the vehicle and thus increase the efficiency a little bit. The best of those mounts have the magnets mounted with a flexible grommet or have a flexible collar that allows all the magnets to sit flat against the metal panel. If there is much of a curve the magnets may not sit perfectly flat and will not hold as well.
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.