Add Internal Corner Braces

What happens here

Cut small sections of the leftover lumber (scraps) to create internal corner braces. These braces will be installed vertically inside each corner of the raised bed, extending across both layers. Drive screws through the outer boards into these corner braces to provide extra support and prevent the upper and lower layers from shifting relative to each other. This significantly enhances the structural integrity of the raised bed.

Goal: Reinforce corners and prevent layers from shifting