wow thank you for disassembly of X50. I am curious to see the main driver.
Loneoceans make disassembly of Mk38, it looks very similar. [ 40,000 Lumen Manker MK38? - A Review and Teardown ]
The charger design looks almost the same.
Be careful with metal dust around the battery, can be quite dangerous. I am sad to see that Acebeam put epoxy in screw. No charge balancing is also a disappoint.