I didn't buy them but my new favorite tool is block boards. Not sure what they are called to buy, I made three and use them so much I made 5 more so I have some when I travel too.
Sale paint boards from craft store
left over batting
glue. I added vintage rickrack on the first ones, the second group are plain janes.
I haven't stitched a block wrong since I started using them to lay blocks out
Or mixed things up going to the iron.