[SOLVED] How to shrink BTRFS image

[Skywatch]

Woah! - This feature should be shouted from the rooftops!

It will save me a lot of hassle backing up working xbians in the future. Now they can be saved direct to the NAS, it's brill!

I admit it took a few attempts to see where I was going wrong, but once there it worked very well and the new card has booted and is working as expected.

Thank you so much (I feel that I am going to have to buy you a beer sometime for all the help)! %-}

I guess that it is not currently possible to restore the image by reversing the process is it?