If you hit return to home when close to you RTH position you will be notified you are too close and can't perform that action.
So RTH won't work if you are within 20 metres or so from your range of position
I have had 2 people here at contrary things. One does a good fit other days it would need to get forced on because the shadow at the front motors isn't proper fit.
Hmm.
Well to return them to China might cost as much as the prop guards did.. shopping was free as I ordered at same time as drone.
Anyone know how expensive mailing something to China is from Canada?