Thank you so much for this revised directions. I think I will be able to figure out how to put it together now. Love this board.

One more question. Once the strips are sewn together, do you have to cut them into 8 1/2" squares first? Or is it possible to just cut the strips directly into 45 degree angle triangles by flipping your ruler 180 degrees for each cut? I guess that one would need a small ruler with a 45 degree angle side to make the second option feasible? Both options would still give you two sets A and B of the triangles. I agree with ruthrings that the strips are probably 4" - 2" - 2". Thanks to MTS for the great diagram for cutting the triangle sets of A and B!