I wanted to reiterate the value of an inspection scope/camera setup.
It is invaluable when looking to purchase an older AS, or looking to repair your own. You can snake them under bathtubs and toilets, hot water heaters, and many places that are difficult to see without pulling things apart. I know this has been mentioned before but I see that MCM Electronics has a sale on them. $29.99 for a USB-connected version. I'm not advocating this particular purchase, as I bought a Harbor Freight version from the same manufacturer, but they are awfully handy in general.