Chastity device discussions and reviews discussion

I picked up a HappyGo cage featuring a urethral insert from Amazon. This is my initial step into both chastity and playing with the urethra. The insert has considerable length, but it feels wonderful. I actually want to make it even longer. Some reviewers on Amazon and members here have mentioned being worried that the tip of the urethral plug might detach while inside the penis. It felt quite snug in the tube, so I don’t see how the penis could exert enough pulling force to dislodge it from within the urethra. Has anyone experienced this happening? Is this a legitimate concern or just excessive caution? Additionally, I sanitized it with alcohol before putting it in and used surgical lube. Is standard plastic tubing suitable for extended wear? I suspect surgical-grade tubing might be preferable due to its softness, though that could increase the likelihood of the tip slipping out. It’s very comfortable as is right now. Any advice would be much appreciated. Thanks