Do this on your own risk.
Gaining SSH access to the box is requires some hardware modifications which I am pretty sure will void your guarantee. So, don't tell me that I warned you. However, it does not require a lot of hardware knowledge. There are probably ways to hack your way around this, but I am not quite sure how to do it. They have locked down access to the ssh port with iptables, so you cannot connect directly to do any sort of bruteforce attempt.
Thus, this readme is based upon having physical access to the box itself. Which I am pretty sure you already have.. Otherwise, why would you read this tutorial.
For this steps, I have used Linux though. Mainly because working with the linux file system on the lametric, it makes everything much simpler.
As I mentioned, this is based on access to the physical lametric.
To begin the operation, you have to remove the bottom sticky pad thing of the lametric. I just just a small knife to peel it of. Should be relative simple. After this, find a small screwdriver. I used a phillips #0. Poke around the edge, and you should be able to find 2 small screws. Unscrew those. After this, on the same row, you should be able to find some small squares. Pop a flathead in, and open the box that way.
This will give you access the the internals of the box itself. Here you should be able to find a SMD microsd card holder. Push the card towards the bottom of the holder, and it should pop out without any problems. You might have to bend the holder part a bit though to gain access. However, not a lot of force should be needed.
With the SD card out, put it into your favorite SD card reader, find which device it got detected as using dmsg. E.g. in my system it was detected as /dev/sdb.
With that information, do the following: dd if=/dev/sdb of=myfile.dsk
After having run for some time, it took about 20 minutes at my machine for the entire 8GB, you should have a file named myfile.dsk containing the disk image of the lametric.