Over the time that I have owned this quad I have improved and customised this quad to overcome some of the initial shortcomings and improve on what already makes this great. I have written several articles on this and have summarised these here with links to the full article plus any other improvements I've since made. Practically all of these upgrades are relevant for the Eachine Trashcan as well (which I reviewed here)
Since then I have found I prefer the V2 mobula frame which is the same design as the V1 but stronger (although not as strong as the V3). This is because I found it was easier to fit my favourite gemfan props and the overall flight characteristics were better, most notably decreased yaw washout compared to the V3. Note: the mobula7 v1 has been discontinued and all new mobulas ship with the V2.
Batteries and related upgrades