I have modified the model from Jarda T so that I can simply stick it under my desk with double-sided tape. I used two Tesa Powerstrips ( https://www.amazon.de/tesa-Powerstrips-Doppelseitige-Klebestreifen-Gegenst%C3%A4nden/dp/B000KJOC78 ) but i think just any double-sided tape will do the job.
The author remixed this model.