I finally did it. Very uncomfortable during the first couple of hours, but it accomplished its goal. However, after being released I took the first opportunity I could to relieve myself a few times lol. Those felt like heaven.
While wearing I tested if I could get some stimulation somehow "in case of emergency". And not even a chance with the thighbands, which are basically connected by the padlock (no chain). I only got close by stretching the skin around the belt, in order to get some indirect movement inside it. But it is surprisingly well designed, the metal cover is not directly touching the upper part (you know, the magic button haha). So even if I get to indirectly move it, it won't rub against anything...
Right now I think it's gonna be impossible for me to wear 24/7...