Speaking of which did you notice the kick-ass basket screen tips? They work well seem durable so far clean easy in ISO/ETH and best of all can hold keif with 0 particle pass-through!
The above image shows on the left a RBT stock stem, on the right is a cut down ISO stem to match the relative length. Please note how this decreases the internal diameter as the glass wall is thicker, just something to note. This pick also shows off the screen well. The ISO stem has a RBT screen installed in it.
The screens
@DDave has fit an RBT stem perfectly with a little bit of a scrunch on the first install, then a snug fit then on.
I have had 0 issue with the stem contacting with the heater screen with this basket screen installed on the top of a stock stem, tho I do believe the final revision will have a bit more space to work with here for safety of the unit itself.