On the lid, the tolerances are tight, it's metal and retains a shape. Which is why some of them might fit a little looser. If you slowly apply (a lot of) force with your fingers you can ever so slightly bend it inward so it presses a bit harder against the chassis. It doesn't take much, a couple thousandths. Or you can add all sorts of "friction devices", say a piece of tape.
FWIW, here is some documentation. Let's start with 0.050 g of 20%+ herb. That's 50 milligrams, 1/20th of a gram.
At 20% assay, that contains 10 mg of THC, assuming full decarboxylation and extraction.
Plus luscious Terpenes and Flavanoids for max therapeutic effect. So in it goes.
After a little heat, shaking between tokes, sometimes breaking up the pieces with finger,
the vapestoffe has been transmuted.
The basket is useful to have, for all sorts of things, but not essential for
normal vaping of dry herb, even for small amounts. It's great for vertical use.
Liquid pad about to be fired. This is fine brass wool, stainless steel is better.
As to H2O adapters, a piece of run of the mill 1/2" ID tubing from the hardware store works.
The tubing can also make a sideways adapter, as for the phone-home stealth method.
Vape on!