Sorry for late reply but not been on for a while,
You undo the main jet one turn and then push it inwards with ya thumb, repeat and the emulsion tube will rise into where the slide fits, remove this and then put two fingers inside the front of the carb and push the plastic slide holder up and out, its very tight and if you use anything other than ya fingers be VERY carfull as not to damage it cause they are not available. On refitting the emulsion tube only goes in one way around due to a cutout at the bottom.