These ignitions seem to sense panic. Relax.

Mr Whunter is right about the size of the tool being critical. It appears you have the right size to fit your experiment tumbler and perhaps it will work on the other one too.

Take a strong flashlight and shine it into the hole on the face of the tumbler. Slowly turn the key in the area where the magic location is reported to be. If your eyes are good you will be able to see the right spot to insert the your pin release tool.

Be patient when you get the tool inserted. Rotate the sleeve back and forth a little. Sometimes its difficult to get it started in the right direction.

If this does not work for you try using something a little smaller than your allen wrench. I used the copper center of a standard cable TV wire.

Luck!