Sure.
Just make the inner and end post short in height and add a fixing plate.
Use the ‘railing post’ and not the ‘built-in’ post.
Use the EDIT function with the posts as the target and the panels as the operator and ‘subtract’ to get the slot.
Or you can model the spigot and save it as a ‘Custom post’ object.
I took the time to create my own spigot in GDL so I have even more control.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad – i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11