I first bought the Dynavap M, 2019 model, worked as it should I suppose. Then I wanted another one just to use with a bong, so bought the Omnivong Titanium, that one does not have a airflow hole, you turn the mouthpiece to set the airflow. I find that one works much better than the Dynavap M just due to the much better airflow that you can set and it stays there.
( I don't have the M model anymore )
Then torch, got the venom 2 (triple torch) and Honest single torch
You would need to watch the dynavap youtube vids to see how you warm it up with both, but I would suggest you start with a triple torch, a little easier that a single torch
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