I filed the front fork on my Raleigh 20 and didn't have any problem aligning it correctly. As Sheldon Brown suggested, I filed the front of the opening. I'm not sure if you'd need to file yours for the same reason as an R20 (on an R20 the stock fork opening is for an axel that has 2 flat, parallel sides; replacement round axels don't fit into the fork without filing either the fork, or 2 sides of the axel flat; most choose to file the forks).