I have a feeling that ou are asking this question in the wrong forum.
Yaesumofo
I would ask the mods to move it to the Homemade and Modified Lights section.
As far as modding it, I have no idea how the circuit is configured.
But the light is very easy to take apart like the original HDS.
Once you remove the bezel, and reflector, the led placement looks
very much like an HDS.
Lets see who will be brave enough to try an emmiter swap one day..LOL
according to Mcgizmo's sample test the cree Q4 outperformed the seoul and rebel 100:
https://www.candlepowerforums.com/posts/2096243&postcount=53
....
I'll personally wait for the V bin Seoul's before I even consider a mod... if one starts factoring other considerations in beyond that of efficacy, it gets more confusing as to who has the better LED. For the market at large, there is serious weight attached to things such as price, lumen maintenance, consistancy and availablilty of tint and its control, thermal and electrical considerations in mounting of the LED's and of course the quality and nature of the raw light output and distribution and how it can be managed by additional secondary optics....