Hello!
If you want, you can look in my post “my new linkei”.
It seems that the photos you can find at the last pages show two linkeii building a bubble nest .. The photos are not very good, but if the quality is enough, you can use them.
I was very astonished to find them doing that, I was away for two weeks, they got just naupliae, made 50% water change and now that surprise, in the front of the tank, just for me to observe … 😉