Marin if you put the other limb on the form and clamp the handle down and start from the fades out and start heating the limb and add some clamp pressure ahead of the area being heated once you get the heat above 350 Deg the wood will plasticize and become easily bendable but don't force it , it will bend with very little pressure providing your limbs are thin enough work your way down the limb and your limb will take the shape of your caul basically with some spring back , you can add wood shims in areas to get the limb to match it's kind of a play it by ear thing no real paint by numbers way as each stave is different but don't worry if it's not perfect on the first go you can always reheat it on the form the better you match the limbs the easer the tiller going to be , it's a little awkward at first but you will get the feel , some times it's easy to over think bow making but the more time in the shop trying it ,it will get easer !