Red, Orange, Yellow
After printing the parts I thought that the stand would be easy to break with only 2 locating points on each frame.
I drilled a 2mm hole in the 3 arms of the inner frames and a 1/2 depth hole in the end frames. After gluing frames 7 & 8 together, I added a piece of filament through the hole in frame 7 and located it into the 1/2 hole in frame 8. Each subsequent frame was slipped over the filament strands and glued in place. Used superglue.
The result is a very strong stand (I tend to grip things tightly so I would have broken it without the reinforcement).
Point to note: PLA and Dremel tools are not compatible! The drill melted a few of the holes and burnt some of the others. Be very careful if you go down this route.
Overall a very nice design and supports my phone well (even with the protective case on the phone).
The deficiencies you may see in the photos are my fault not the design.