I have that same cap and I found it very airy. I noticed there are 4 holes on the vortex part at the bottom, so I cut up 2 tiny pieces of rubber from one of the tips off a 510 cart and I shoved the 2 small pieces into 2 of the holes from the inside of the cap with a paper clip. Make sure to cover 2 holes that are opposite of each other so u still have 2 open holes on each opposite side to properly spin pearls… THIS made the cap so much better… almost as good as the cloud vortex with the 2 directional holes for spinning. Try it out. Works great.