Question: Making a Solar Dry Box
Option 0: Gather your materials, using metal door hinge brackets and dryer lint fabricate the parts, One slanted 500mm batten and one with dryer lint,  fix the back plywood (200mm) with staples, Take two slanted, one normal and one battens with dryer lint grooves (550mm) and glue them into the cut-outs in the longer legs (Beine) for the back, Glue the longer batten (500mm) in between the two longitudinal battens (Längslatten, 470mm) and then fit the whole thing in the front and side subassemblies for the floor, assembly all the sub assemblies.
Option 1: Gather your materials, using metal angle brackets and swallowtail fabricate the parts, One slanted 550mm batten and one with swallowtail grooves (Querlatten) are fitted into the cut-outs in the shorter legs (Beine) and glued,  fix the front plywood (188mm) with nails, Take one slanted, two normal and two battens with swallwtail grooves (550mm) and glue them into the cut-outs in the longer legs (Beine) for the back, Glue the shorter batten (490mm) inbetween the two longitudinal battens (Längslatten, 570mm) and then fit the whole thing inbetween the front and back subassemblies for the floor, assembly all the sub assemblies.
Answer: 1