Learned the same lesson after a pin backed out on me, so now I tug every connector before moving on.

A $40 scope finding a cracked weld in two days is a good day, no question. But I'd pump the brakes on calling it serious before you know what that weld actually was. A crack on a burner front is one thing, a crack on a pressure boundary is another, and honestly a $40 camera with a soft lens and no real size reference can make a hairline look way worse than it is. Half the guys I know who swear by the cheap ones end up re-shooting the same spot with a real scope because they can't trust the picture. It found something, that part's real, but finding it and knowing how bad it is are two different things.

My buddy got reamed for leaving his pit lookin like a raccoon died down there, so now he keeps one of those little handheld vacs clipped to his bag. Takes him like two minutes and the lead tech leaves him alone now.