Here is a elk horn and sinew only bow I made last year, it is 36" and has a draw length of 20", being drawn 18" in this picture. 6 layers of sinew backing, bow did not turn out exactly how I had planned but this was a first from me with elk horn and very very difficult to straighten out the twists and turns, however in the end I had a shootable bow that is very functional.
I believe the main mistake with this bow was not pushing the handle back toward the belly, it would have helped the bow tremendously. But overall i was pleased with the results.
maybe a little more bend through the mid limbs too.
Eric