Putting up a frame around my Hawaiian Guava tree

I recently pruned my Hawaiian Guava tree so that I could put a frame over it so that when it fruits, I can put an insect mesh over the frame and hopefully protect the fruit from fruit-fly (which do significant damage to the fruit).
This video is of me putting up the frame.
All the chunks of shale that we have in the ground made it very difficult to get the stakes in exactly where I wanted. I had to compromise on symmetry a bit, but got there in the end.