I had an issue with a crack on the left and bubbling up on the right. I am stumped to why it has happened. First, I thought it was from not holding the AC while swapping batteries then it came to me. The only time I swapped batteries with the AC on all 4 was when I first bought it in Nov . Of 2018 and I did not like how all 4 legs bent . So from that day on I held the AC up while doing the swap. I have to rule out that as the cause. The second thought i had is when the AC lands and makes contact to the ground. Is the craft bending the legs enough so over time the cracks appear??? Maybe....I never sat on it.... the case it's in does not have enough forced/stress on the body. Anyways it's getting fixed under warranty....
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