As you can see, the points do not have to be sharpened much at all. Just enough is OK. Most of the fix is done by the notch in the adjoining stock rail. I no longer have any problems with derailment on my #4 Kato turnouts; the mainline takes the diverging route in the turnout shown. For some even better pictures of what's being done here, see the following photos done by "Tudor" on http://www.trainboard.com