there is a gal who has re-written several of the old patterns like the tumbling block so that there are no Y seams...she breaks the diamonds apart as some posters have said, sews strips then sews the strips together. Google "not your grandmothers tumbling blocks" and you'll get her information.
Originally Posted by Katrine
If you dont want to do Y seams, as Lucy said, just do 60deg triangles. Stitch the triangles together in vertical rows, then join the rows. I did a Christmas hanging like it (ignore the hollow cubes, just look at the solid ones)
http://www.quiltingboard.com/t-50464-1.htm