Modular box corner

I'm designing a modular box that can be made using lengths of pine trim from the local DIY store.

This design requires timber 30mm x 10mm to fit, but the length is up to you.

I am still working on the design and have only printed one version of it so far, which didn't turn out great due to the orientation of the item whilst printing.

Please feel free to offer advice or feedback,

Cheers