You basically just solved the problem of having to actually go through getting a frenum or PA piercing. Many people are afraid of getting that pierced since it's the sensitive area and also a lot of people are afraid of getting infections near that area. This is a much better alternative.
Great idea and actually very simple. A few improvements: Make the piercing on the cock bigger and remove the metal ring so you can get the white plastic pin straight through the pierced hole. Then use the none-replaceable plastic lockers with numbers on and the plastic chastity device can be used when passing through airport security. Should be impossible to pull the cock back and out. So, again, great idea!!