I swapped out the stock emitters in an SP36 for 4 3535 sized pink emitters from KD. The output of the SP36 is pretty well matched to the pink emitters, except turbo won’t be available at a battery voltage of 3.6ish.
Pretty straightforward. The driver is glued in, so I used debonder and pushed the driver out by pushing on the top of the driver through the switch hole with some needle nose pliers.