This insert is designed to fit inside the insert that came with the Kickstarter version of Power Plants. Each model should be printed once. Some of the corner trays can look similar, check for inset arrows and rounded corners to find which corner of the tray should border the insert corner. 
Individual player wizards are stored in with the plants, though with careful arrangement some could stay with the sprites.  There is room for all the micro expansions that came with the Kickstarter.