Printed with handle aligned vertically - use a small brim and tree support under the head (dont bother supporting the holes or the embossed “Thwack” lettering). I used 0.20mm layers on a 0.4mm nozzle (BambuLabs X1C), 25% gyroid infill, with 8 walls and 1.2mm top and bottom surfaces.
Printed with ABS and it works a treat for all the usual Thwacking purposes.
The author remixed this model.
Standard Thwack with a hollow added to the handle to save a bit of filament.