The 54-40 or Fight blocks always frustrate me, because I always seem to sew the side triangles on wrong on half the blocks, no matter how carefully I place the pieces before I sew.
Mpeters, you can chain piece the blocks, but be very careful. It is an easy block to cut if you have the Tri-Recs rulers, and you can also use the Tri-Recs rulers to cut diamonds.