Okay, as an update: I just tried it and it worked fine! The strap feels definitely more comfortable. Just make sure you have a nice cup like the one in the video, because mine was more cone-shaped and the strap moved after applying the water. Thanks for this tutorial, dude!!
Dude I was just wearing mine today and thinking about how stiff it is! I read your viewer´s comment, but I was waiting for your video!! Will definitely share the link with anyone I see in the same situation!! Good one!!