They make security screws for the flip top. IMO as they are all the same then once someone has the tool, then the flip top is not secure! The lock only protects the tank and honestly do not know how many key combos are out there!
Like with anything, How hard someone has to work to steal your stuff is what maters! Sometimes it is better to leave your windows down and all open. Least then the damage upon hopefully recovery is lessened.
