Thanks I did contact fiat classic Sweden and the answer was drainage plugs. There are 2 sizes the larger one is 2.5cm, I haven't measured the other but I am guessing half an inch.
The smaller ones are cut off so it only makes the 2 large ones. It seems they made both parts cut off from the beginning opening up the one that was needed. They are supposed to be rubber, I just did them with the granules that followed with the machine, done a bunch for fun now and they are no longer coming out dirty
About the Uzay lol no, I do have plans that will be revealed in time
no worries I won't do repros except possibly a better version of my glow in the dark sabers. Currently setting up the water cooling and making the new mold. This is machine is why I've been inactive for a while
The Fiat mold is for sale if someone is interested. It should be from the 60s~ I suspect the machine was sold and the mold followed.