IR-Lock Accuracy Improvement

I am doing a project using the IR-Lock precision landing system. I have gotten it to work and I am getting decent results. I was wondering what parameters I can change and any tuning that is possible to further improve the accuracy of the system.

If there aren’t any simple parameters to change or simple tuning, I would appreciate someone pointing me in the direction of helpful portions of the code I might be able to play with and re-compile to try and make improvements.