Clio III GearShift Knob Adapter

While removing my old gearshift knob, I broke the adapter.

So with the broken piece, I designed an equivalent/compatible model.

The lever rod has a diameter of 11.0mm (11.1 to 11.2mm on the knurled areas).
Try many inner diameter dimension, starting by the highest value.
It needs to be tightened with some force so that it doesn't move.