Quadror blocks were conceived as a folding support structure. They are composed by 4 L-shaped identical parts that are glued/bolted two by two. This model will print this 4 parts together already assembled. Unfolded quadrors may be placed side by side and stacked to form a wall or a pillar.

After printing, carefully separate the two parts with a utility knife.

Original model: https://www.thingiverse.com/thing:925450