I have an entirely different, and easier IMHO, approach to this quilt. It can be made as a square in a square set on point with the sashing creating the 'lattice' look. Other than plain squares, these are the only blocks to be made
[ATTACH=CONFIG]363995[/ATTACH] and [ATTACH=CONFIG]363996[/ATTACH]
If you PM with your email address, I'll send you the EQ5 file