I had wings on mine but removed them and used them for reinforcing the corners with 45's. To support the wings I used threaded rod bent in a loop but after the fact I realized I could have done with just the ends and maybe one near the fender as the looped rod gets in the way of storing items.
I used 3/4" Birch as it was strong and the cheapest @ $40 a sheet. The drawers were dato'd on the bottom and rabibited on the ends. I used 3/4" oak and datoed them into the sides about 1/4", this allowed the remainder to sit inside the slides.
Build thread here
https://forum.ih8mud.com/threads/yes-another-drawer-build.801906/
I used 3/4" Birch as it was strong and the cheapest @ $40 a sheet. The drawers were dato'd on the bottom and rabibited on the ends. I used 3/4" oak and datoed them into the sides about 1/4", this allowed the remainder to sit inside the slides.
Build thread here
https://forum.ih8mud.com/threads/yes-another-drawer-build.801906/