I did the same fix for my mother-in-law’s calculator. She teaches high school kids and this is her mainstay. Of course one day it got the dreaded disappearing rows (where two or more rows go dead), and this was the fix someone recommended on the forums.

Now my own 83 is in the same state. Although I have a Ti-89 kicking around, I still miss the ergonomics of the 83.

All in all, wanted to say thanks for the writeup.