thanks everyone for the heads up. And I'll check the bleed valve for air, but shouldn't the overflow reservoir receive any air trapped in the system?
Anyways, I'll be moving those fasteners and bleeding any air left from the system this afternoon.

So far this mod has been doing it's job: no worrying about a coolant leak and something left there that no longer needs replacement.

I also noticed how thin these rubber hoses are on the LR. The walls might be mesh-reinforced but they do look thin. Maybe because the engine moves a bit so they need to be flexible, but if any other hose causes trouble, I'm swapping them for the heavy-duty stuff...