No issues. Here's the sequence of steps:
1. remove the sealant at the base of the module. It's only a couple mm thick.
2. you'll see tabs capturing and locking the bottom plate to the case. carefully bend these the tabs out of the way to release the bottom plate
3. remove the bottom plate to reveal the board
4. pull out the board. This will have SMD parts and not through-hole parts.
5. Locate U2043. Identify Pin 1 and then count the pins to locate Pin 7
6. cut the trace on the PCB connecting Pin 7 to the large copper island
For LEDs on the back, see my
recent post about the BMU. I'd love to hear if it works for you.