Now comes the more confusing part. At least one of the pins has to be changed in order for the original key not to work, since you cant add metal to the key you have to add metal to a pin, there are two options; make a longer pin to go into the lock mechanism or 'steal' a longer pin from a different part of the lock. I gave it a lot of thought and finally decided to steal the longest pin in the mechanism and use it to replace the shortest pin. Its really difficult to explain, first remove the metal cap that holds all of the springs in the mechanism, the springs fly so do this carefully. Before you go and remove any of the pins take a look at the key you plan on modifying. Emedia music academy. There will be a series of ridges, one for each hole. Pick the highest and the lowest ridge on the key and figure out which pins sit in those two ridges. Remove the pins and the spring in the hole that corresponds with the highest ridge on the key, put the contents of it off to the side. Now replace everything you just took out with the contents of the hole that corresponds with lowest ridge on the key. So you want to end up with one completely empty hole and one hole that has a different set of pins in it, in addition to all of the pins you didn't mess with. Once you have done this make sure the pins don't fall out and put it to the side. If it is still unclear there is a diagram on the next page.