Make sure one end is down on the build plate when slicing, no support should be necessary I printed this at 80 mm/s with 25% fill and 0.6mm wall thickness, it shouldn't need to be any stronger or more precise Keep the layer height small to avoid the need for supports. I would recommend 0.2mm layer height Print should take about 2.5 hours depending on your speeds, infill, wall thickness etc. Once print is completed, cut 3 strips of foam or cork to fit the three smaller diameter sections Glue and use a rubber band or masking tape to hold foam or cork in place until adhesive is dry Assembly should take about 10 mins plus additional time for the glue to dry