So a quick layout looked like this:
All the blocks need trimming - horrid job so I'll tackle the blocks a few at a time. I probably should have trimmed them as I went along!
I even have 30 blocks left over, useful for swapping if I feel some of the blocks in this current Trial Layout are too similar.
I also counted up how many 5" String blocks I have made - 105.
I have made a note of how many of each colour I need to make to be able to sort them into sets of 4 for each block. Not too many.
It's amazing how these Projects using scrap blocks mount up.