tech diffusion

Hi, Is there a way of editing the rate at which tech diffusion is calculated? It's a bit too high for my taste. I've looked in A_New_Dawn_GlobalDefines.xml and GlobalDefines.xml and also the BUG mod options screen in game but I can't find anywhere to change the TD rates.

First off, thanks for the continued support for FFH2! My friend and I always play with Advanced Tactics enabled (mostly for the great generals, it feels wrong without them in the game). Some questions: 1. Tech diffusion... what impacts it? I understand that you get beakers towards techs that...