self-help technique decoupling - feedback

Hello,
I am new to this forum. My name is Steffen, I am a professor of psychology from Germany. I have developed a self-help technique called decoupling (for research article see bottom), which we offer at no cost via our website: https://clinical-neuropsychology.de/manual_reducing_trichotillomania/
This technique has worked quite well in nail biting and trich but not skin picking.
I would be grateful to know if some of you have tried the technique and for your experiences. Suggestions for improvement are very welcome. Hope it has work for some of you
Yours,
Steffen (email: moritz@uke.de)

Prof. Dr. Steffen Moritz, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Homepage: clinical-neuropsychology.de/

Moritz, S. & Rufer, M. (2010). Movement decoupling: A self-help intervention for the treatment of trichotillomania. Journal of Behavior Therapy & Experimental Psychiatry, 42, 74-80.
Moritz, S., Treszl, A. & Rufer, M. (2011). A randomized controlled trial of a novel self-help technique for impulse control disorders: a study on nail-biting. Behavior Modification, 35, 468-485.
Weidt, S., Klaghofer, R., Kuenburg, A., Bruehl, A. B., Delsignore, A., Moritz, S. & Rufer, M. (2015). Internet-based self-help for trichotillomania: A randomized controlled study comparing decoupling and progressive muscle relaxion. Psychotherapy & Psychosomatics, 84, 359-367.