I'm looking for something to add a bit of length to help with the heat from the mouthpiece, but without having it be too crazy long like the regular Arizer stems.
I use an original Solo bent stem in my Tera. It has length without height and bends (to me) over the display screen.
Two silicone O-rings (20mm OD, 15mm ID), stacked in the space above the bowl, hold the stem.
I can also use the magnetic lid (with the metal & glass removed); it fits this stem perfectly.
All but one of my straight stems (aftermarket?) have shoulders that are too high for the plastic to sit right.