I designed this monitor stand because I liked the idea of repurposing objects, therefore the plank is a random piece of wood I found lying at home, not being anyhow used.
There are no supports needed. I printed it in PLA and it still holds just fine, therefore I think there is also no need for some more durable filaments.
As for the BOM, the wooden plank has a thickness of 16 mm, it is 155 mm long on the left side and 160 mm long on the right side. Additionally, there is an option of putting an M3 nut and a bolt at the back of each side to adjust the tightness of the fit.
The author marked this model as their own original creation.