I had some pre-cut units that were on the bias. I used tear away interfacing. Ask at joann's, you can buy it by the yard. Pellon Stitch 'N Tear is one type, it's 20 inches wide. Cut a piece about 24" or so, by the width of the the interfacing. Lay the interfacing down, then a row of the 2 pieces of fabric, right sides together, matching the edges of the triangles with the right edge of the interfacing. Pin the triangles in place to keep them from falling off. Now sew your 1/4" seam thru the fabric and interfacing. Fold the interfacing back on itself at the seam and tear it off at the quarter inch seam. The interfacing keeps the triangles from stretching and also from getting 'eaten' in the plate. Since you only loose 1/4" of the interfacing with each bunch of triangles, you can really sew a lot with one piece.
You actually can use paper for this. Adding machine tape, THIN copy paper etc. The stabilizer is made to tear away so it's easier to remove.
Also, for any pattern that uses a flying geese patch, you can always substitute 2 half square triangles. You will just have an extra seam.
Last edited by PaperPrincess; 10-23-2013 at 04:59 AM.