Looking for mod to add "ON indication" to UniqueFire UF-1505

Hello guys,

I am using UF-1505 for my IR 940nm build which I use for as illuminator for my night vision hunting gear. Driver used is Nanjg 105c. As the IR light is very dim (and not healthy to look into), I would love to mod the host to add “on indication” on it (ideally illuminate the tailcap when it is in “ON” state).

There are lot of great projects here on tailcap illumination when the flashlight is off, which I cannot use. I might have overlooked something but I did not find a solution for my situation on the forums - I would be grateful, if someone has a solution to this!

Thank you!

Lubos