Thats a good idea Dave! Only thought about locking, but sure an alarm is the easiest way.
And Mr Tony, of course you are right and anyway: if you dont know how to open it, you make so much noise that it is much louder than an alarm! At least that was my experience the first time. laugh2

Nuts will be checked, good advice!
And I īll check, if smell comes from the drain of the tank slot.
Will look funny when I crouch over the car with the nose on the car like an old police dog...