This is just a remix of the Net Pot Ring from this model by To0kan from Thingiverse to have a tighter fit on the “Upgraded Modular Hydroponics Tower - More Compact & Stable” by Conr8r.
The part that goes into the tower slots now has a diameter of 51.8mm, so it doesn't wobble around any more. It also is higher/deeper to give it some extra grip. It is not a press fit, so it still can easily be added/removed from the tower.
For the net pot itself, you need the model from Thingiverse, but for the ring, which holds it together, you can use my version.
Print settings as usual, nothing special at all. Just go with whatever you want, it will work.
The author hasn't provided the model origin yet.