My review of this light is here: “REVIEW”: DQG Slim Ti (1/2 AA and other batteries) ***[DISCOUNT CODE ADDED - 05/22/2018]*** 
BTW…I only modded the tailswitch, the GITD tape and the TIR lens. I don’t see many possibilities to mod the driver/LED as I explain on the review!
Maybe other members here can make some magic stuff with that 