Wrist gave out around fitting 8" is all I needed to hear. Better late than never.

Nah, deleting feels like losing memories, I keep everything for a reason.

That old mirror and flashlight trick works great if you already know the exact spot to look. But when you're chasing a leak that only shows up under certain conditions, crawling around with a mirror gets old real fast. I borrowed a cheap scope for a similar issue on my truck and found a cracked line buried behind the intake manifold in like ten minutes. If you work on different planes or vehicles all the time, the scope pays for itself just in saved frustration.