Hello everyone! I just purchased a used Inspire 1 from B&H for $1999 condition 8+ out of 10 supposedly it comes w/ all original parts. Any crucial items to inspect or look into? I have a 30-day return & 90 day warranty according to used department at B&H. Should I check w/ DJI if serial number of Inspire is good for warranty or does authorized dealer B&H takes care of everything? Is there a revision A or revision B of the Inspire 1 or just one build version right now? Any help or info would be much appreciated!