I needed a junction box to hold a small 5V PSU-Board as well as a Relais-PCB within an REV-Ritter cable duct. Here is an qick model for that. It can be fixated wihin the duct with the two T-Screws.
I left some space on the bottom of the box to allow some clearance for the mounting screws that hold the cable duct.
The two long channels can be printed with briding, only the area around the screw-holes and the clearance spaces on the edges needed some supports. I added an 3mf file with painted on supports. There is also an modifier for a solid 3mm baseplace within the box to allow the mounting of some standoffs or other screws.
The author marked this model as their own original creation.