just maybe, w/ pax1 the choke point WAS the screen (milkshake draw).. but now with the new and improved pax2 screen (50% wider flow) and oven lid in place... the new choke point is now exactly in the center of the oven (50% screen resistance/50% lid resistance) creating the perfect ebb and flow of air/oven heat mixture?
No, the choke point can't be in the middle of the oven, it is where the airflow is most restricted. As I said, I did this test with the original Pax when I first got it with the same result: the airflow was reduced when I put the oven lid back on. If the screen were the source of the restriction then it wouldn't matter whether the lid was on or off.
@pakalolo are you saying you get more airflow when the oven lid is off?
I need to get more familiar with the vape terminology lol not sure what you mean by 'choke point' and a few other terms.
That's not vape terminology, it's a term in fluid dynamics. It's simply the point at which flow is restricted due to reduced cross-sectional area.
Yes, I'm saying that there is better airflow without the oven lid. Try it yourself. Pull through the P2 without the lid and without stopping or chnging your draw speed, put the oven lid in place. You'll find a reduction in flow.
This is a point I'm curious about. My experience with the Pax 1 was that it would heat up to the set temp, petals turn green. Then, if one were to leave it undisturbed for a minute or so, the light turns blue, a few minutes thereafter the entire unit shuts off, regardless of the extended mouthpiece. Isn't the blue light indicative of the oven cooling and not being at the right temp? Wait too long and pick it up, the lights turn purple again to indicate heating.
So...apart from the lip sensing tech to actively heat counter to airflow/cooling from inhaling, what else is different? I'm still confused about this...
In the Pax 1, the oven continued at full heat until the Pax detected that it hadn't been moved for 30 seconds and then a cool down kicked in (blue light). If you kept moving it, the motion detection never timed out and you continued to cook your load. On top of that, since the oven had a higher thermal mass (largely due to the metal in the oven lid) it cooled quite slowly.
In the Pax 2, 10 seconds after it no longer senses your lips the oven starts to cool and the lower thermal mass means the cooling is more effective. Even if you keep moving it the cool down still happens. The result is enough reduction in cooking of the load to preserve flavour longer and increase efficiency. If the sensor doesn't detect your lips (or a touch) for three minutes, it will shut down. You should note that if you touch the top that will defeat this timeout even though you never put it to your lips. Touching it will also bring it back to full heat if it has lapsed into cool down.
In both cases, if the Pax is left motionless after the blue light comes on, it will eventually shut down.
Pretty much identical but not identical and slightly improved
Honestly, I vastly prefer this (minimal clouds) especially if I'm vaping on the go or in public spaces. I packed the herb in tightly using the edge of the oven cover to tamp down, it was about 4/5ths full. When done the herb comes out in a brick, the color is pretty uniform except for the outer layer interfacing with the oven. Placing a screen or other conductive cover will probably fix that but since I use my ABV for edibles I really don't care 
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