Key file does wonders

To say it in advance: On delivery, the cover is so tight that I did not dare, she fully defer. I used a tapered needle file and processed mainly in the part of the guide rails at the closed end the Führunsschienen up and down (happens automatically because the file on both sides polishes) - also I went again towards the closed part with the tip, I suspected that there were inside the guide ridges - Files after about 15 minutes brave, can this "Euro Product" now use fine - an effort that I like to take into account with regard to the Sony original parts costs.