So after the sound board dowel is drilled and split. You will need to make a wedge. This is simply a piece of the 1/2" dowel that fits later into the call to hold everything in place.
You will then need to cut a reed. You can buy precut reeds or cut them yourself from sheets also available on the web. PM me and I can let you know where I get the stuff. You can also simply steel the reed from that now piece of sh!!!t plastic call you bought from the store.
You may have to do some trimming to it though. As stated in the last post, any alterations to the reed or sound board will drastically alter the sound of the call. So trim "slivers", very little at a time in order to make the reed fit on the sound board. If cutting your own reed, start with these dimensions. 1/2" wide, 3.75" long, with one end rounded. The rounded shape will again effect the end sound results, so you will need to play with shapes to achieve the sound you desire.
The only other piece you will need to purchase is the O-ring. You want a 1/4" rubber o-ring.
You then have everything you need to piece it together.
If I missed something, or something is confusing just say so. Again this is my first build-a-long.