Well in the past month i searched for some info about the BR2306S motors as i wanted to test how cheap motors perform but found only some thrust test witch were a little subjective. After i tested them, decided to make a short video.
Main issue: in 3 out of 6 motors the bell is evidently uneven and produce vibrations (from this reason the gap betwen the magnets and stator is varianting)
Conclusion ?
Buy them ONLY if you have a budget limitation and need more thrust. Otherwise, go for a medium to high priced motors to avoid the hustle.