Yea, the stock J20 setup beats this S88 light in heat sinking by a mile - it's pretty bad. Not much within reason I can do bout it I'm afraid. Unfortunately for me, the light will be for show. If a could make a video walking around in the woods on a cold winter night, that would be cool, otherwise it's gonna be a 10 sec wow light.
Gonna go with HQ's BLF SRK triple driver here.