Adjustable fuel pressure regulators: Which ones hold static rail pressure?

[7M4EVR]

Pinched an o-ring while installing the injectors in the rail.

Nope, just ruled that out.

 

[IndigoMKII]

That would cause a visible external leak, though.

Fuel line coming off the fuel pump could be leaking. I installed fuel tank approved fuel line, not just fuel injector hose but the submersed fuel line.