The newer Wurkkos HD20 appear to have a threaded bezel on the bottom now, which would make swapping both emitters much easier. I know several people had asked about emitter swaps in
Wurkkos HD20 Review: The Largest Headlamp I Own! - YouTube
First NLD - Wurkkos HD20! Had a super crappy cheapo headlamp and a super old work light go out in the same week; did my research here to replace them both at
Comparison of the Wurkkos HD15 and HD20 Headlamps with Beamshots - YouTube
Wurkkos HD20 Headlamp Rechargeable 21700 Headlight 2000lm Dual LED LH351D XPL USB Reverse Charge Magnetic Tail Work Camp Light - AliExpress