You dont want to be feeling sore, if you felt sore wearing it then the thing isnt a good device.
When using silistretcher as ADS, or with weight you will feel some obvious discomfort, but soreness is something you never aim for.
I'm going to be taking pictures very soon of the silistretcher showing its force on the siliscale compared with the phallosan. With the phallosan for example it has a green, yellow, and red color gauge for the user to see how the intensity is ... I will show using siliscale on a phallosan that the silistretcher is stronger.
This demo isnt on a penis, but simply me pulling one end attached to the devices.