Hard to startup after it sits for an hour or so

The description isn't clear. What do you mean by "I missed getting air in gas rail"? You don't have to bleed anything. That is handled by the fuel pressure regulator and return line.

You're doing yourself a disservice by piggybacking on this post, especially when there is no usable information to use for a diagnosis. Only the three of us will see your question. You should start a new post so all the experts will see it and have a chance to respond.

Also, when you have an engine running problem, please list the engine size, the type of transmission, the mileage, and a complete list of symptoms and what you've checked so far. Things like "doesn't start" and "hard starting" can mean dozens of different things. We don't know if there's a starter system problem and the starter doesn't crank the engine, or if it cranks fine but doesn't run. That's like saying "I'm in pain; why?"

The only thing I can guess from the original post is perhaps fuel pressure is bleeding off. It's a simple matter of connecting a fuel pressure gauge to see what happens one minute, one hour, and one day after stopping the engine.