Just toying around with another idea today as i had a lock that i just couldnt open...
I have some blade shims that i use to remove plugs where you push it in the rear of the cylinder to hold top pins above the shear line.
Iv always wondered if i could do this from the front in a lock out situation.
Cylinder plugs have a slight lip on the front to hide the sheer line of the lock to prevent this.
I decided to go at it with a junior hacksaw and cut just deep enough to reveal the sheer line. Id imagine the same can be achieved with a large enough drill bit.
With a bit of wiggling and a splash of wd40 it is now possible to shim open the cylinder from the front.