Mason, that is great news!
TBH, I did wonder how on earth a tumor could invade your skull and not be painful. Usually tumors that destroy bone are excruciating, is what I've heard. I mean, we know you are tough, but SHEESH!
That is terrible that you had to be so worried (ahem, and all of us!) for so long. The human medical system moves at a snail's pace. When I get an MRI or a CT scan done on a patient, I have the results and the report that day or maybe the next day (the radiologist's final report, not a resident or guy on the street or whatever).
Anyway, I think that the best news is that they didn't already cut a window in your head!