The button on my food processor broke so I modelled a new one and printed it. It was a tight fit so I dropped it in a cup of boiling water for 10 seconds before I fitted it to the blender. It works great. Printed 0.2 mm height. 3 shells, 0.3 infill. No support. Placed in a cup of boiling water to softem a bit before I fitted it to the food processor. I was a tight fit but it works flawlessly and looks good.