How to make parameters in CFG changing during playing?

[AlucardNosferatu]

Hello
I am a player focusing on stealthy of jet fighters, recently I heard about ion stealthy tech in real life so I wanna make the ion thruster of origin game be able to absorb EM, which could be used as a ion generator, then I follow wiki and modify the CFG, and the rcsReductionFactor makes me a little bit confused, too large nor too little number is suitable so I start to think about a variable rcsReductionFactor changed with ion thruster having different amount of powers...
I want to learn some suggestions from others about making a new part with a feature of variable rcsReductionFactor, I will be appreciate it if anyone could tell me sth about this question.
This ISSUE will be closed after 1 month.
Thx.