Well, you were warned that this project would be on repeat for a while yet.
It's actually starting to look like a quilt and the inter-webs have been scoured for ways of straightening the edges - from stitching specially designed pieces to cutting bits off.
No decisions made yet but I happened upon some bargains at Penrith Patchwork.
The dark blue print is backing fabric from the sale bin; the white/red/blue print was heavily discounted if you bought what was left on the bolt; and the lighter blue is a wee bit of William Morris.
These should finish the project nicely.