I finally got around to starting the sinewing. The sinew I'm using is domestic cow sinew that I traded for on PA. It came already shredded but I shredded it a bit more before adding it to the bow. I'm using a commercial grade hide glue I got from a friend. I think he got it from an art supply place. The bow is pulled into a slight reflex on the form. I used a loop of sinew around the bow and hooked over the screw hook to hold the bow in reflex while I add the sinew. The sinew loop will become part of the backing and I'll cut off the excess.
The first thing I do is set everything up close by. I use a crock pot of water as a double boiler with a stainless steel pan floating in the water with the glue in it. Also I always have a bowl of warm water and a wet towel handy to keep my hands from being sticky while working with the sinew.
Once I have the crock pot plugged in and the granulated glue mixed with water to become usable it's time to prep the bow. I start by scrubbing the bows back with Dawn dish soap and warm water...
...and rinse the limbs with boiling water...