How about the disappearing 4 patch - with a twist go to
http://round122.blogspot.ca/2012/dis...iht-twist.html I have a not on my pattern for a 12" block begin with a 7 5/8" square. Been over a year since I made this for our quilt club BOM pattern I shared. If I can do this I am certain you can and it is really a neat block.