I am in the process of making a Yurok style bow myself. Tillering is not typical "short bow tillering". I have made quite a few short ones and the paddle style is a bit different. Now this is how I did it and certainly not the only way. I got it bending in the widest part of the limb first and slowly worked to the tips, got them caught up, and then worked into the handle. These things need to work every inch of the wood. What length of bow and draw length are you shooting for?