What you'll need
 

Flutes

One of the more complicated parts of the seat are the flutes. There are several kind of flutes and several ways of producing them. I will show the way I did it. The description refers to a sample of 8 flutes. Best is to practice on a piece of scrap till you have a satisfying result. To practice put at least 4 flutes on your sample.

There a two possibilities to do the flutes. First you cut single strips of leather and join them or you take one large piece of leather and fold it over. Latter is more complicated in my opinion and needs lot more experience to get the flutes straight.

The width of the leather strips is utterly important for the result. You can measure your templates or calculate the right size for your requirements.

The folds of my seat were 2.4 cm wide (maybe it was originally intended to use 1 inch which is 2.54 cm) One has to add about 5 mm each side for the seams and about 1 cm for fluffiness. That's a total of 4.4 cm per strip.

Take a piece of calico, cotton or other strong fabric and mark the visible width of the flutes (here 2.4 cm, black lines). Now mark a second line about 5 mm right of the first line (this is the width of the seams, red lines)

Now put the first leather strip on the calico. The back is upward and the right edge is on the first red line. This is for your sample. If you do it on your seat you have to put the part which attaches to the left underneath the strip front facing upwards and both parts aligned to the red line. Then sew along the now invisible black line. Therefore you can use the width of the sewing machines food or some of the little helpers delivered with your sewing machine.

After attaching the first strip you just fold it over and align it with the red line as shown in the next figure.

Now repeat the first step by putting the second strip on the first one and align both with the red line. Sew along the invisible black line to attach both strips to the calico.

Fold it over. The first flute is now finished. Congratulations.

Now you repeat the steps until you have put all flutes on the calico.

Ok now follows the stuffing. I will explain this as soon as I find the time for it. If you have any questions or ideas contact me.