The way I used to do it was tedious and was quite complex, however with the v2.0 release of the wafel_setup_mlc plugin, region changing has become much simpler.
It is identical to just rebuilding the MLC, but this has region changing specific...
That's why I don't get too involved in the forums I don't want my name all over the damn place but I do feel like I had a doing in the Leo and Luke love battle lol