Week aqua D1 rod height securing ring

The ring has a function to allow to set the height and be able to rotate the lamp without messing with the fixation screws and accidentaly change the height setting.
It works with Week aqua aquarium lights with a one arm fixation (D1 versions).
It is particularly usefull, if you use an aquarium lid, which opens by rotating it up, so the lamp is in the way.
I use PLA, and a 6mm long M4 screw. Easiest is to use a tap drill, but probably you will be able to self tap the thread with the screw as well, but you will need patience (I have a thread drill which consists of 3 drills, I only used the 1st 2)
V2 version: slimmer design, to be used with set screw (M4x5)