I am making another on point quilt with blks i just won. cut the triangles to fit the block size and forgot i want sashings! I cut triangles for 12 inch blocks not 16 inch! I am short of fabrics and was trying to make sure I had enough so cut first. mistake! now i need 24 inch blks cut diagonally twice! I am trying to figure if i can just add sashings to the triangle to push it out toward the edge of the quilt for a border to fit.