[zorobabel]

Better late than never, but I have to tell you I fixed the brake pressure issue. It's been 3 months already, but at least I had time to make sure it works.
It wasn't the rotor, caliper, brake hose or brake line - IT WAS THE MASTER CYLINDER. What exactly was it inside of it I don't know, I don't feel like taking apart that SOB, I just replaced it.
I guess it only affected the front driver's side caliper because of the bad design of the brake line circuit (as I mentioned in an earlier post). If I had more confidence in this car over the long term, I'd redo the circuit to a more conventional/simple layout.
Thanks to all of you posters for bearing with me!