Great job on the vids Crash, I like the style and they feel friendly and informal which is nice.
I'll comment on the first set of vids first
Dropping eliquid right into the vapour chamber will cause it to boil up right away and the flavour will dissapear in moments. The Iolite just isnt suitable for that. An ecig vaporizes e-liquid a bit at a time rather than doing it all in one hit the way the Iolite wil do it.
Also, 24mg e-liquid is way too much for the Iolite unless you use the J-Adapter or a hose to cool the vapour before it reaches your mouth. The intensity and heat will overpower you and thats why you are coughing.
Now on to the alternative...
The cotton method works fairly well. I would recommend cutting e-liquid down to at least a quarter strength with PG or VG and using about 6 drops on the cotton. Ensure the liquid is only in the cotton, and not touching the aluminium chamber.
I prefer the gauze method. In older models with the removable heating pin, you can push the upper screen out of the herb chamber, invert it and install a few gauzes inside. This will act like the material in an atomizer, holding the liquid and vaporizing it in a slower, more gradual way. There is only room to do this when the heating pin is removed.
With newer models with the fixed pin and circlip fixed herb chamber screen, take half a dozen gauzes and punch holes in their centres. Slide these over the heating pin in a stack and drip the liquid onto them. Again they hold the eliquid and allow for a slower release of vapour.
To add eliquid to herbal molasses, I find it better to mix up a batch of molasses and eliquid so it is nicely blended rather than dropping it on top of the material. As the molasses works more slowly, mixing the eliquid in also makes it release the nicotine more slowly.
I have stopped using the foil crucible method, I just removed the lower screen to aid cleaning and put the molasses directly into the chamber. It is easy to clean up with a damp interdental brush or q-tip and I find it less hastle than making up the crusibles. Just my preference. I then do a weekly deep clean with Dr Green.
I would strongly recommend vaping on it through a short hose or getting the J-Adapter if you are finding the vape too hot.
Andy