We had calm winds in my neighborhood this morning, so after walking Parker I grabbed my Mini and did an altitude test. I discovered that I had to replace 3 damaged propeller blades (more on that later), but after fixing the aircraft, I popped it up to 90 m and had a look around:
In the climb to that altitude I discovered that the tallest building in the area is only 70 m tall, and trees tend to be around 25 m tall. These are very useful data points when flying a tiny UAV that doesn't have obstacle-avoidance features.
Update: Here's the raw footage from the test: