I've just uploaded the above cage to Cults3d. I've been wearing the prototype for over a week with no issues or comfort problems. Slightly different from a lot of designs in that you insert the pin first and then slide pin and penis into the cage shroud. https://cults3d.com/en/3d-model/naughties/pa-chastity-cage-with-sliding-pin Sorry it's not free, but it's not outrageously priced.