Which FCC Mod Do You Recommend for the DJI Mavic 3 + RC Controller?

[AydinT]

Hello, I am a Mavic 3 + RC controller user. I would like to install a permanent and reliable FCC mod on my device. Which site or seller would you recommend? Some sites perform the process on the drone, while others do it on the controller. I would appreciate it if you could share your recommendations with me in detail. I prefer installing the mod through the controller.