i mostly made it to enter the constest that is going on and i am trying to figure out how it works. i hope the desighn works. i made it to not use up too much of your fillament wile still fitting a paper towel roll on it. i have added both a pre assembled and seperated file so printers that cannot go to 30 cm can still make it. the split version has a ‘pin’ to guide it in the right place for assembly.
there is also just the bottom part of the split desighn in a loose file, this one will hold a toilette paper roll perfectly.
please note that i added a slightly more beefy version to the model, this one is based off of feedback i have gotten. i have also added some tolerance to the tip of it where it connects. i hope this will work to fix the ones you might have already printed.
The author marked this model as their own original creation.