A thought came to me about what could be a fairly easy method of turning the design of a fixed temperature convection vape into a variable temperature one, without having to adjust the power to the element. This would be to have some way of introducing cool air into the hot airstream between the element and the herb. And of course, it should be possible to control how much air is allowed in, so the temperature can be tweaked to a desired level. Exactly what form this would take, I'm not entirely sure, but what do you think? Maybe you have a clearer picture in your mind of how this could work.