The upper image shows the bubble solution tray for the machine. A vertical crack down the left corner ruins the tray. In the lower image, a screwdriver pierces the crack for identification. Four out of the nine kits came with cracked bubble solution trays. We were in the middle of the class course and there was no time to ask for replacements from Shenzhen. I think we will have to either find a plastic container about this size or repair what we have. I will try to repair but that will add another $1 of cost to the project for super glue.