I printed this design on my Prusa i3 mk3s and did not have to sand any part of it. Since I was not able to upload single files you could just use the tinkercad link to go and export the parts there. In the tinkercad model you will find all the needed parts layed out and then the built model to show you what to put where when you build the mixer. All of the parts fit perfectly, but I can't say the same when I printed it on my Creality. So here are some tips to make it easy to fit together this fun little project:

• Use a round file to easily make holes a bit bigger
• If the shaft can't fit into the square holes, use a flat file or sand paper to make it a bit smaller and keep testing it to make sure that you don't make it too small
• When you want to put the shaft into a washer/gear and it is a very tight fit you can use a vise where you open the vise just enough for the shaft to fit though and when you then hit the shaft the vise will block the washer/gear and let only the shaft go though, thus allowing you to put the washer on the shaft.
• You can use the washers to secure the gears into place to make sure that they can't slide on the shaft.

This prints without supports and I printed in on 0.15mm, but it can also be printed on 0.2mm. For the infill I used 75% to make all the parts stronger, but still flexible.

The tinkercad link is also in the descriptoin where you can go and see where every part needs to go. There are also photos included to show where the parts need to go. I hope you enjoy this little project and post your makes. Also please let me know if some improvements can be made. Here is the link to the single files of this project: https://www.myminifactory.com/object/3d-print-the-mixer-single-files-106561