The hole is so small already, and once you get used to the genisis mods the more airy the better. IMO
When I draw in I don't want any more resistance than breathing in air.
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Somebody needs to make an adjustable draw DT, from wide open to completely closed, just by turning the DT. Would need a valve in the bottom right after the 510 connection. May be expensive in comparison but would make every device extremely versatile. Big bucks to the person who makes that animal.....take my idea and use it....just tell me when and where i can get one when they are ready.