Print Details Layer Height - 0.15 mm Infill - Tri-Hexagon Infill Density - 50% Base Adhesion - Brim No supports. Filament - PLA Weight - 9 grams Print Time - 1 hour 22 mins Post Processing Once printed remove the Brim. Remove any blemishes or strings from the surface by filing, sanding or cutting. Sand the flat side of the spinners to remove any roughness as this will help ensure the surfaces fit together evenly and prevent gaps in the spheres that will affect the sound due to air leakage. Regarding leaks, the 3D printing process is known to produce small gaps between and in layers as a result these will require filling in. The gaps are filled in with lacquer, enamel paint or epoxy resin this is applied both internally and externally and left to dry. If necessary clear out the holes in the spheres with a 2 mm drill bit. Clear out or widen the holes for the strings as required. Following this a suitable plastic glue is applied to the flat surfaces of the two halves and these are bonded together. The spinner is complete. Assembly Measure approximately 1 metre (39 inches), of string/twine. Thread the cord through both string holes to form a loop and tie the ends together with a suitable knot, I used a square (reef) knot. Handles. Subject to the string diameter and finish you may wish to add handles or use gloves to prevent the string rubbing your fingers. Handles may be created from the following: Two large body felt tip pens (loop the cord around the body), dowels (looped with cord or through holes), or circular disc cut from wood (loop cord through hole and body). Other options may be considered such as 3d printed handles.