Thanks for the model! Until yesterday everything worked fine and I was really surprised the thread actually worked flawlessly on the first try.
After several hours of printing the upper pin of the frames broke apart. I guess it's due to adding the frame brace https://www.thingiverse.com/thing:1896013 which increases the jerk for the holder (the front brace is less flexible now). I just reprinted it with a 50 % infill. PETG would have been a better choice than PLA.
However: maybe a little rounding of the right angle would reduce the stress at this point.