Default How to manually patch settings in Kernel

I would be grateful if anyone with more knowledge than I would be so kind as to give me instruction on how to write a patch to modify some settings on my SGH-i497, relating to touchscreen sensitivity and other settings. There are no compatible apps (to my knowledge) and almost no information or development. This is a rampant problem with users who want to use a stylus on the Tab 2. I am in search of a solution.

Running TWRP 2.4.4, SuperSU, ROOT, Stock everything else.

AT&T 4GLTE Tab 2 "10.1" SGH-i497.

I do not want to install a custom kernel or ROM at this time due to a lack of development. I just want to change a few settings to make my touchscreen more sensitive, and to reduce the track delay to zero. There is an app that does this for several Samsung devices, and will function on the Tab 2, but it has incompatible superuser protocols, and will not save settings. Perhaps this app is a good place to start??? Development on this app seems to be dead.

APP HERE