I have not opened that model, but have done other Jetbeams.
since the driver has wires that are soldered to the LED board, the disassembly probably goes something like this:
1. From the top of the head tube, Remove bezel, lens and reflector to expose the LED board
2. unsolder the wires at the LED board, and possibly also there are wires to the aux LEDs that need freeing..
3. lift the LED board out of the light and set it aside.
4. pull driver, out the bottom of the head tube
this thread may also be useful to you for visuals of similar lights.
https://www.candlepowerforums.com/v...-Disassembling-a-Nitecore-SRT3-Anyone-done-it
however, most of that thread is about splitting the control ring assembly for regreasing infinitely variable control rings, which you probably do not need to get involved with, with your model, since it has detentes and is not infinitely variable.
when in doubt about your tools and skills, consider finding a modder willing to do the job for a fee. skylumen might be worth asking.... I am not affiliated
this is what a partly open Sunwayman V10r looks like from the bottom
I know your light is not exactly the same, but I believe the same strategy applies
the wires still need to be unsoldered from the LED board before the driver can be replaced
there are pics in this thread
https://www.candlepowerforums.com/vb/showthread.php?461619-V11r-First-Impressions-w-3500k-E21a
of the wires and solder points on the LED side of another similar light, the Sunwayman V11r