That’s good to know, I run my billows through a 1 1/4” hole that I drilled and made a damper for. Works perfectlyI was having a little trouble with temps and finally started using the "dog bowl" manifold from my old Pitmaster IQ 110 instead of a single vent hole. It seems to have helped keep things a little more stable. Here is a recent cook, the Billows kept the temp within a 10 degree window for 18 hours. The top vent was cracked open about 1/8" or less throughout.