Battery design is a big mistake, there are reports of damage due to hard landings or bouncing, something I am well familiar with when learning on my other quads. This quad needs to be switched to normal for landings, or even hand land. I hear landing is vey tricky in Manual. OriginalDobo is printing a "bumper" for the batteries and some additional TPU accessories, the Battery "shield" looks promising, waiting on his video. Front landing legs are also suffering, getting badly scuffed because this thing will drag a little before leaving the ground, probably because of the slight forward angle on the props, so every time you take off on a porous surface, expect scuffing. I think OriginalDobo has a printed shoe for this too, not sure, but would be a good idea anyway.