I used a medium thickness CA super glue, just a couple 2 mm sized dots and that was plenty to get it bonded. I did it on a clear blue VMU and it didn't show up as looking glued.

Hey all! I wanted to thank this community for the documentation of their build guides for Kite's Circuit Gem, the were super helpful for my first circuit gem build in a clear blue VMU and it was a success! Special s/o to @markyPi for the inspiration and introduction to this little "Gem" and @kiteret...