I think it's a simple thing. The base of the device seems solid enough and having 4 wheels is a good thing. On the other hand, the telescoping handle is plastic and I wouldn't want to pull on it. The 50 pound amp overwhelmed him. "Bungee Cord" is a flat, stretchy fabric that is only secure when stretched to its limit. And again, any elastic cord for use with a cart is a risky proposition in my opinion - it's far better not to use non-elastic straps. He's already on his way back.
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