Last time I did a pork neck in the Big Green Egg I had some minor issues holding a low and steady temp, which is partly due to the red gum being evry difficult to keep lit at low air flow. I did manage to keep it going with the Digi Q controller but the temp did climb too high at times.
Anyway, I'm doing a 2.4kg pork neck this time in the Asmoke 350 and it's holding perfectly around the 107c setting after 3 hours so far.