Another Leah Day Walking Foot Design: Gridlines.
In addition to the videos, I have her Explore Walking Foot book and am finding it to be a good resource too.
With her directions this was easy, although time consuming to do. The Hobbs batting sample is very firm and I think that made it easier to quilt (although I'm not sure).
This design sort of reminded me of a mattress pad or the pre-quilted fabric my mom and I bought for projects. I know Leah has some exciting places where it will show up!