I recently got a (very old) Traktor Kontrol S2 MK2 controller on a budget. Almost everything works fine; one of the small issues is each jog wheel has a small section that needs to be pushed down very hard to activate scratching (the rest of the wheels still do activate with a light touch). I tried holding down each load button for several seconds as instructed in Traktor's calibration dialog and that did not solve the problem. So I wonder whether there is a method to fix or adjust the sensitivity so that scratching can be comfortably performed.