I took a break after writing the above and finished the block which was quite laborious. I had cut the outer white pieces bigger so I could trim the completed block to the correct size only to make a stupid mistake, trimming one side to 6.5" and the other to 6" . I'll compensate to some extent when I frame it.
|Freezer Paper block|
|Here you can see the pattern I'm working from|
|My (mis) completed block.|