Yeah @simonp47, you hit the nail on the head. That camera's caught stuff I would've missed for sure, but it ain't magic. Last month I swept a flue that looked clean as a whistle on the screen, then the homeowner mentioned a weird smell near the attic hatch. Climbed up there and found a gap in the brick where the liner met the chimney wall, completely hidden from the camera angle. So now I do the sweep AND check the attic access if they got one. Still, I'd rather have the camera than not. It's like having a second set of eyes, even if they ain't perfect.

Oh man that's genius with the packing tape, I had to do something similar once with a tiny scoring wheel from an old game that just wouldn't stay put. Ended up cutting a circle from a beer box and using a paperclip as the spinner arm, worked way better than the original flimsy plastic thing actually.