I'm going to wait and see if I can scare up a better gauge for the inlet. They don't track that close, and even though the refrigeration gauge is pretty old, I would trust it over the new HF one. Seems to me that as the blue one climbs past 80 when setting it up, the HF one gets "high" in readings pretty quickly.
The spec for these for 5" bore and smaller is 40 thou. Even thou this is not a "spec" orifice, I'll leave it as is.
The thing is, you cannot really drill out orifices. The drill marks cause turbulence, which disrupts the flow. I would bet that a high velocity system with a drilled orifice might even flow LESS than the original 040
