I swapped LEDs in another one. The first was red, yellow and blue and was chosen to take by my grand nephew. This one is red, green and blue. I bypassed the resistors in the driver for the blue channel only, assuming that that one has the highest forward voltage. It draws 0.9 A, 0.3 A and 0.6 A in red green and blue high modes. I could bypass the resistors for the green also, but it is not on direct thermal so it might have overheated as the yellow did. The direct thermal triples have their LED pads too far apart. I am not sure what it will do with other battery types and charges, so I am not bypassing the green circuit resistors at this time.
Something was chewing up the o-rings. One of the original o-rings was broken, and I kept finding bits of 0-ring here and there. I think it was a rough edge on the hole for the nut. I scraped it with a rounded knife edge and sanded it with 220 and 400 sandpaper. I think that fixed it.