I haven't got round to trying this yet but thought id post my idea anyway, air stacks are basically a cone or flared eyelet to help improve air flow and i was looking at my air hole and thought it might be worth trying, it might even make drags quieter and stop that slight whistle but Im not sure.
I have a stretched ear and a type of stretcher that can be bought in small sizes look like a tiny air stack and might be perfect.
8 Gauge Plugs 316L Surgical Steel Tunnels Double Flare Eyelets PAIR 8g 3mm | eBay
Velocity stack - Wikipedia, the free encyclopedia
Might just be easier to drill a bigger hole!
Let me know what you think
I have a stretched ear and a type of stretcher that can be bought in small sizes look like a tiny air stack and might be perfect.
8 Gauge Plugs 316L Surgical Steel Tunnels Double Flare Eyelets PAIR 8g 3mm | eBay
Velocity stack - Wikipedia, the free encyclopedia
Might just be easier to drill a bigger hole!
Let me know what you think