"Andrew Gabriel" wrote in message
...

Most electronic systems will have measures to defeat such probing.
Typically after two or three wrong codes, some timer will be invoked
during which all codes will be considered wrong, and each further
wrong code entered will double the timeout. Might be even worse in
that after so many wrong codes, no code will ever open it, like the
PIN numbers for SIM cards and cash cards and some car radios.

Maybe 'The Old Fogey' will be posting for any angle grinder recommendations
next! :-)