The additional IR module arrived this week and today I finally found time for rebuilding the DIY infrared illuminator. The original driver was simplified, now using just one resistor in the circuit, that drives the LEDs with 830mA only. I have added one more driver, for the second module. Now the module weight is 49g, and it is still mounted on top of the battery.
I am still waiting for the starlight fpv camera, it should be delivered by middle of the next week, so I hope that my night vision stealth solution will be ready soon.