I know this guy... works in the security arena
Does Bank vaults and safes, etc

told me once, Safes aren't invulnerable they are all just deterrents.

I have a Liberty Centurion Lagged to the floor
Keeps my kid out of em, I feel better leaving the house knowing they are locked up in there. Can someone get in? Yes Can someone get into a TL-15 or 30? Yes. Only differing degrees of security theater.

The only other advice I would have for you is to go up to the Franklin series at least, and BOLTS BOLTS BOLTS!
The more live bolts the better.