Affordable articulating bore scope.
 

Sloppy Mechanics had a video on this today; I can see a ton of uses for it, including for everyone worried about bore scoring. But as he points out in his video, check water pumps and other cooling related issues. Vevor articulating bore scope

If you feel you need a SnapOn, MAC, beta, or other "professional" version of this, because this can't be any good, 99.44% change they are all made on the same assembly line.

This URL is bad...

Thanks @TMc993 should be fixed now. Just in case:
https://www.vevor.com/pipe-inspectio...p_010921210736

Thanks...That's a nice scope at a good price. My current scope sends a wireless feed to an app on my phone. It works well but taking video/images with the phone while manipulating the scope can be frustrating at times. The articulation function and built-in monitor on the VEVOR would make it pretty simple to use.