Inky phat: tri-color to black/white

I have a black/white/yellow inky pHAT, and I’d like to use black/white settings for faster refresh rate. I’m able to display an image/text when I use:

from import auto
board = auto()

However, if I try to manually set the board type to “black”, I get the following error when I try to set_image().

Traceback (most recent call last):
File “”, line 1, in
File “/usr/local/lib/python2.7/dist-packages/inky/”, line 367, in set_image
self.buf = numpy.array(image, dtype=numpy.uint8).reshape((self.height, self.width))
ValueError: cannot reshape array of size 30500 into shape (104,212)

Here’s what I’m trying to do at its most basic:

from inky import InkyPHAT
from PIL import Image, ImageFont, ImageDraw

inky_display = InkyPHAT("black")
inky_display.resolution = (250,122)
img ="P", inky_display.resolution)
draw = ImageDraw.Draw(img)