Here is my serendipity build. I built it to madbean specs with a opa2604 opamp. Sounds great. I have tried a few opamps including tl072/ 4558D/ LF353 and I like the 2604 best at the moment with the 4558D coming in second.
Props to haberdasher for the excellent board. This was my first build using an etch board. Worked well and no troubleshooting needed.
Labels are some small vinyl stickers I found at hobby lobby. I cleared over them a bit.
Here is a photo.
(http://img.tapatalk.com/d/14/06/25/e6uvu6u5.jpg)
And a gut shot.
(http://img.tapatalk.com/d/14/06/25/beja2y8y.jpg)
Sent from my iPhone using Tapatalk
Nice job! Simple so often is best.