I am also experiencing the misfire issue. Noticed that the button has to be pushed right in the center and pretty firmly. Notice the click noise when it is firing right. Mine is "airy" too. This is only my second PV. I started with a KGO. Yesterday when I started with the LT, the "airyness" was not a big issue for me, but the loner I vape on it, the more I wish it had a little tighter draw. I don't want to feel like I'm sucking a golf ball through a garden hose, but a little firmer would be better.
I am probably the only one using my LT without a tank type set up. I am just using a SR Boge carto on mine. I just put one of the cones from my KGO over the carto and it helps *just a little* with cutting the airflow down. The KGO cone does not thread on to the connector very well, but it stays in place and fits down inside the recessed space around the connector. Is the outer barrel of the connector threaded? I can't even tell. The KGO cone does seem to be to be gripping some threads, but it is not perfect. I just have it lightly screwed on because I dont want to jank my threads all up.
I will be looking forward to others responses regarding these issues that some of us are having. I don't want to be totally bummed with the performance of this LT (and I'm not.. totally).
On a positive note about this LT... I Love the feel of the SS and the weight is something I really like. I think it is a sharp looking unit overall and am still happy I purchased it. I felt it was a good unit to get me started in VV and "moving up" a little from the KGO I started with.