The second prototype
So, I found out out with the previous prototype that too much pressure at the top of the belt (where the screw sits) causes bruises. Therefore I changed the belt and added a bigger ring like structure at the top, so that the pressure is evenly distributed. I also wanted the penis cage to be a fully closed tube because with bars I feel it is less secure. I have a 3D printer at home, so I started and printed a tube. I did this by printing two halves and then cleaning, smoothing and finally gluing together the halves. Afterwards I added a layer of paint. This is what it looked like: This worked out much better. The pressure was distributed over a bigger area, however I still felt that the area at the top could be bigger to be even more comfortable.