Interesting that you brought up the stretch fleece and resin idea though... I've watched a ton of YouTube videos to help plan this out, and while the fleece/resin idea works great for odd/organic shapes, I feel that using the MDF on the top and front square the box up nicely and fit in with the general shape of the interior. Also, it seems easier to attach the fiberglass section to the MDF than wrapping/securing the fleece to the fiberglass. Either way, thanks for the firsthand knowledge and congrats again... It turned out quite nice! Can't wait to see it finished...