How to Clone a LattePanda image

I have multiple LattePanda's to set up and more in the future. It would be extremely useful to clone an image from a master LP to another. These are activated Win10 images so my plan would be to get the BIOS product key and put that into the OS product key. This is the way some of the recently shipped LP's have to be activated anyway.

Has anyone been able to clone the disk and, if so, please share how you did it. 

Thanks

PS, Please don't hijack this thread with questions on how to change the product key. Here is the thread on how to do it: viewtopic.php?f=10&t=1271