Same here my cutting doesn't depend on my finding "the perfect razor" for the job. or one cut leading me back into always cutting, or once in a while thing.

I can have no razor in the house and have the urges come up. I can have 20 razors in the house and not have the urge to cut. My cutting urges come when the memories and flashbacks get going really bad and when I am under stress. I can go months without cutting and then the thoughts are there. I have lasted a year and almost 7 months and still those urges come. I will probably always bounce in and out of the urges just like my friends that are alcoholics or have done drugs and whether or not I never cut again well only time can tell. I don't make promises to myself or others that I may not be able to keep. I just keep it at all I can do is take it one day at a time and meet each round of urges head on fighting against it.