one reason these type Vapes are so efficient is because of the restricted pull. They are designed to work with a slow draw. That keeps the air hot enough to vape the stem tip contents. You can experiment with lighter loads but once you realize the flow must be restricted to get the correct vapor, you slow down the pull. I make the parallel to a kinked water hose. If you turn up the water pressure(ie suck hard) the restriction will stay the same or get worse. But if you turn the water down(or ease up on the pull), you will get a bit more water out of the hose(and vapor in the lungs). Kinda like don't force it, go with the flow, etc. A properly packed stem will reduce the airflow by about 1/2 that of an empty stem. The important thing about packing/pulling technique is if it is not working right, alter your technique a little. Adjust the flow. These are not turn them on and use devices. Not at all like the big guys or a dube or a pipe. The flow is restricted by design. I must say, for some reason that my feeble brain cannot understand, a length of tubing on the end of the stem makes for much bigger pulls. Maybe someone can explain what is going on. Does that tubing act like an extension of your lungs or what? Extra bellows? Amazing we could go almost ten years before realizing that.
rbrown13, you might try shooting some compressed air down the heatport assembly. Maybe a clog up with some fine particles as that one was around for awhile. We find the restricted flow set up in a stem is about the same restriction whether in the Zap or out. Put an empty stem in the3 port and suck. Is it restricted? Could be your stems are a bit gooey? Older, semi plugged stems do not work like a fresh clean stem.
Not sure what is going on out there but we are back to a week turn around at least from order to ship. We do appreciate all the support. I kind of wondered when all that wood came into my flow a couple weeks ago but I wonder no more.