I managed to find some time on the bus ride back from LinuxFest Northwest to get the LCD working. The display will be used for onboard editing of the dictionary when using Stenosaurus in standalone mode - i.e., not using Plover and presenting itself as a normal USB keyboard to the host computer. When using Plover, the display isn’t necessary, but might still be useful in some way I haven’t thought of yet. Either way, Stenosaurus won’t require any special drivers to work.
Next up to test are the microSD card and the USB port.