With these you can make the air hole any size you want.
Made mine a little larger on the RM's but still smaller then 1/16
Used them on a stainless ERA also,,
Gadgets and Gizmos Bead Reamer Set | Shop Hobby Lobby
Am I the only one who sees the humour in a "Bead Reamer"
Just be sure to keep it away from me I dont like that kinda Sheet