As it was a championship, the lock was known.
I used a measuring tool similar like this one on the top right side,
to check the right depths
http://217.91.101.183/kroeplin-extern/i ... g=de-sales
I us a an impressioning handle.
As I know the type of lock I know how many filestrokes I need for one depth(almost...)
For me one of the most important things on impressioning besides the right technique is to develop a routine.
I always impresion on pin tumpler locks in the same way.
Same impressioning movements on both sides, same amount of movements on both sides, same filing movements etc.
So as it was about speed, I optimised everything, to be as fast as possible.
The second in the competition opened in around twenty minutes.
I normally need 15 - to 20 minutes on an unknown lock, but it can take much much longer too, especially, when the lock is greasy and dirty.
As written in any book on impressioning, the most important thing is - only file where you see marks - if you are not sure leave it alone - because if it is a right mark, it will come anyway.