SD STUDIO DESIGNSE-Z Tabletop Easel for Art or Photo Display in Black

I have a 36 x 48 dry erase board that i will do presentations on. is this sturdy enough to write on? how wide is the tray to sit the board on?

Has the zipper been improved? Lost of complaints about them falling off so I am reluctant tto purchase and then have the return deadline go by.

Would it hold a 24x36 frame?

I need it to support mixed media artwork in a shadow box that is almost 2.5" in depth. Will the two parts atthebottom support this?