Hey Donna, We sell a cryostat alignment tool. Check it out at our store http://store.techonebiomedical.com/store/cryostat-alignment-tool.html . If you need an explanation of how to use it, please give me a call. Thanks Matt Mincer TECH ONE BIOMEDICAL SERVICES toll-free 866.497.3033 | office 708.383.6040 | cell 708.822.3738