OpenHornet assumes all builders are using a CNC router so we don’t fully detail the CNC’d/flat parts on the drawings.
Don’t despair! A number of builders have successfully built the structure and associated parts by hand, using common woodworking techniques. You will need to layout all the SVGs contained in the build package so you can print them at 1:1 scale, and then use the resulting printouts as a template as you fabricate the parts.