Woah wait, $150 for a camera that can't even beat a flashlight and mirror? That's rough dude.

Yeah so that's not quite how the optics work. The issue with singlemode on short runs isn't that it's "too sensitive" in the way you're describing. Singlemode transceivers are designed for long distances, and if you plug one into a short patch cable, the light can actually be too strong and overwhelm the receiver, causing errors. That's why you'll sometimes see folks using attenuators on short singlemode links. Multimode handles that better because it's built for shorter distances and the light scatters more, so you don't get that overload problem. Good catch swapping them out though, sometimes the fix is just using the right tool for the distance.

Yeah, did you tip the guy extra for that look? Sounds like you got the veteran driver who's seen it all. I remember shipping a dead Chevy Malibu once, and the driver showed up with a jump pack but didn't even use it, @murray.cole. He just shook his head, hooked it up, and said "another one for the graveyard." That $350 seems about right for the privilege of not having to explain why your car won't start to a guy who's probably hauled worse. The last guy I used even told me he once winched a car that was literally on fire, so a dead battery is just a Tuesday for them.