I did look at that and thought that the pinch there will help with the problem of getting the GODAMN SCREEN TO STAY IN PLACE!
Well, the idea is actually to use the female taper itself for a bowl here! So the 1/2" screen doesn't come to rest somewhere within the middle of the adapter's body (it will fall through then, as it's too small for that), but rather at the hight, where the female socket joins that body!
That works with the injector port of the Couchlog, as that is a plain end ss tube of ~14mm outer diameter (not a tapered joint), that'll enter only a few mm into the female socket before sealing and so leaves enough space between injector port and screen, to use the joint proper for a bowl.
See pic below:
Blue line indicates the max depth of the plain end CL injector port entering.
Red dotted line indicates the position of 1/2" screen
Nice thing is, doing it that way allows using basically each & any female 14mm adapter for a bowl, regardless of a given adapter's individual form & shape.
If, on the other hand, you want to utilize this method with a vape, that uses the tapered male 14mm ground glass joint for an injector port (maybe with one of your own ball injector vapes, you're building), the male joint would then be too long and so would leave no space for the herb
To make it work you'd have to shorten the male 14.5/23 injector port first to about 15mm length or a bit less.