Remodded the case based on Koji's suggestion, but may have found the bigger problem trying to fix the wrong thing. I got a chance to play around with where pressure on the ribbon caused my display to mess up, and think it may be due to some ribbon damage I hadn't noticed before likely caused by me not being careful enough when trying to fit the modded display into an improperly modded and therefore too small of a case. Below I have a picture of the screen display without any pressure to the ribbon:
Since this looks perfectly fine, I never assumed I had damaged components of the screen. The next is a picture of the screen with pressure on the ribbon attached to the bottom of the screen, caused by reassembling the case:
The double-image seen here is only present when putting pressure on the right side of the ribbon at the bottom of the screen, which led me to noticing damage to the ribbon itself:
I recognize I'm pretty far off-topic from the K-B front light mod being discussed here, but I figure it's a problem that some of you guys installing the mod may have run into. I guess I'm really not sure where to go from here, but I've got to assume that my screen problems are from the damage seen in the last photo, right?