Originally Posted by LoveBBQ
In this case the important thing to have is a flexible design that allows infinite control of air flow. Plugging an entire hole to reduce temps may be too much. With a ball valve or magnet you can do really small adjustments to dial in temps. It just depends on how much you want to control those temps. For most things it probably doesn't matter as long as you are in the ballpark so corks may be the ticket!
I went with a ball valve so I didn't have to bend over all the time to adjust the intake. What can I say? I'm lazy like that!
Real easy to adjust the ball valve with your foot. I don't think i could fine tune the magnets as easy.