As you can see, I have a good amount of eyeshadow unpotted and put into my blank palette. I actually made this palette as I could not find any large ones in stock on etsy. I bought a 12x24 inch magnetic sheet from Amazon for about 8 bucks. I had an extra foam board I used to make the rim of the "well" and the base is scrap cardboard and fabric. I think I should be able to fit all my eyeshadows in this. I will need another for cheek/lips. Not a bad effort though I might try washi tape to cover the next one. I highly recommend trying this if you are the slightest bit crafty.
Cheers!
Peldyn