anyone out there having any information of the performance of the h520 as a mapping drone in the field or the h520 as a search and rescue drone in the field would you please get back to me and let me know how it performs as I am trying to purchase one or thinking of purchasing one unique although I just heard that they are living the US, this is of great concern and why because I recently had a problem with drone parts coming from Shenzhen China??? I was told this is due to some of the legalities between the United States Europe and the UK. Xiaomi rep told me that they have some legal red tape concerning the shipping of parts from China to the US???