box for fi q 15s

[AKMH 0]

I see pictures of raw boxes with Fi 15s and up in them and they all have double thick (looks like) 3/4 inch mdf. So is this really necessary? And if it is, what about the sides, do they need to be doubled to? Also whats the best type of bracing to use?

[BKOLFO4 29]

All depends on the box design. Larger areas of wood tend to flex more and need to be thicker or braced more.