I mark the 9-patch using a large ruler and marking the center at the outer edges then I turn the ruler and line up to cut with a rotary cutter. After cutting both directions, I turn 2 opposite new blocks 180 deg. to forn a D9P. This is a current project. I am doing half the blocks with the dark pieces in the corners and center and half with the light. This is a Christmas present for a friend. When it is complete, I will post the finished quilt.
9 Patch
[ATTACH=CONFIG]250419[/ATTACH]
Cut and slightly separted
[ATTACH=CONFIG]250420[/ATTACH]
two opposite pieces turned 180 deg.before sewing together
[ATTACH=CONFIG]250421[/ATTACH]
D9P Block
[ATTACH=CONFIG]250423[/ATTACH]