Yeah Ive found with the Derringer and Bonsai it doesnt really matter that much due to the fact you can just move the airflow and point it where the coils at. Its not like my airholes ever end up in the center once its screwed down to the atty anyways hah. It does help a little to push em in a bit though to make sure youve got room to tuck one side of the wick underneath it. I only do single coils so one side of my wick goes underneath the coil, while the other end goes between the posts and fills up the back well. I had some crazy jumping resistance the 2nd time I built the Bonsai and it turned out it was because the coil was making contact with the chamber so I forced that sucker to move and ended up destroying the coil in the process. Fun times!