MID acid etch bridges? do they work?

This is part of a bridge that I modified. I had inherited a patient list, and his 17-year-old girl had a missing front incisor replaced by an acid etch bridge made traditionally by the previous dentist. It failed regularly. One day I decided to remove a wing. As you are aware most American animations show two wings, but I had heard the logic of a single wing, and while she literally cried in the chair while I removed a single wing, and replaced it as seen below.
​I'm afraid most photos I take are low quality, but they are taken quickly as a record to jog my memory not to present at a lecture.

​These pictures were taken about five years ago. And when I last saw her earlier this year the bridge was still there, fitted with the original Panavia from 34 years ago.
It's a vivid memory as I knew she thought I was making a massive mistake, was asking her mum to stop me. I had just become a partner in a practice, and even then I thought I could get sued and my name being mud.
At the same time as the photos, I took a PA. Hmmm

​I had to raise a two-sided flap, remove labial and lingual bone, and push the root fragment through lingually, and place two resorbable sutures, having warned her of the potential debond due to me not having the correct luxator, as well as all the other potential risks. I want to say it went well, but that would be lying. I said "Oh, that's interesting. Do you get any discomfort under the bridge?". No was the fortunate reply for both of us.