it’s highly illegal to tamper with meters. Once sealed, access to the mounting screws can’t be got at usually.
I wouldn’t do it these days unless in a squat and babysitting a grow room or two.
Those seals turn out to be surprisingly easy to get hold of! I wanted a couple for my main fuse and meter when i rewired my house, guy gave me a bag full. Used 2, kept a couple and sold the rest on for a tidy profit 😁