Changing line 79 to 0x004 worked. The pixels are aligned.
Changing line 61 (not 68) to 0x008 looked good for contrast. I played with several values. 0x009 also worked. 0x010 is where the background started getting funky.
Keep line 55 at 0x0a2. To get a reasonable screen using 0x0a3 I had to bring the contrast down to 0x003.
Some people might consider the display to be upside down, but this is the orientation in which I would like to use it. It allows buttons beneath the screen to be as close as possible. Are you cool with leaving it like this in the library? It would mean one fewer steps in my instructions.
