I'm the type who thinks more is always better
and I don't know what the regs are in NSW but here in VIC you don't have to bolt the safe into the floor and wall
solidly bolted to the wall is enough if it is too much hassle for you to bolt into a floor
vice versa as well
earlier this year a farm was broken into where the thieves stole the gun locker and the wall it was attached to also
as they used the farmers tractor to pull the safe out I shouldn't laugh
if thieves want it you can only slow them down