The model is quite easy to print. Supports are required only for the lower ring., its protrusion hangs in the air. The set includes a model with pre-installed support (a gap of 0.2 mm). It is better to print the plug from TPU or other flexible filament. In the original scale, the wall thickness is about 2.5 mm. The current height of the model is about 14 cm. At the same time, the diameter of the lower hole is 38 mm, the size of the coin receiver is 36 * 3 mm. But of course it is easily scaled in the slicer, as you like (don't forget to scale as well the plug).
The author remixed this model.