Ok this is a pretty easy one first off, Dont and I repeat dont over wet your leather get it just wet but dont turn it in to a spounge.
second thicknes of your leather will effect the out come as well but there is a trick for those tight bends, once you have it on a mold and wet start to form it and if you get bunches cut the leather in several spots 1 inch away from your finish edge like a pie this lets your leather form better, if you want I can post pics.
Hope this helps
josh