For what its worth, my '18-M use to restrict more on the first cooling click. My solution -
Didn't want to file the '18 - this also provides a little clearance at the fins.
Interesting, while reading far too much on Vapcaps, your mod reminded me of some posts where folks were talking about not having their cap all the way on. Obviously, one would load, then not fully push the cap on, and then torch, I was confused while reading them, I believe their issue was to gain more airflow.
(this would not work on IH heaters where you have to press down on the sensor/switch)
Your inner cap mod, would solve the IH issue above. Since this is my first VapCap, I want to spend time using it as designed, then go from there. In the end, I guess I’m a no carb user, though I do play with the carb near the middle/end of my draw. I don’t currently believe there is any small mod I do, that would give my old lungs, using just the Tip/Head by itself on a wand enough flow. But, I may try moving the cap out one “notch”, before I heat it, and do anther water piece attempt.
Here is my concern with moving the cap away from the tip. And I bring this up for debate, as why not?
Do experienced VapCap owners mess with moving their cap away from the tip, to gain airflow? Since it’s not designed this way, my first thought is this could effect torch heating, as the cap is not in its default position. A small negative might be a little material falling out, I assume fine grind would be more of a candidate.
As I’ve mentioned in previous posts, I’m extremely happy with using this device as designed. But as soon as you remove the tip, to use it to drive a water piece, the carb on the handle is now out of play, and the air is now only coming through the tip area. And for those that can handle that restriction, I’m jealous.