I have a short bone saw -about 10" and use it to split haunches and cross cut spines. It came from David Stretton and is quite course . What I want to do is to cut down the spine in order to produce nice chops or racks with th spine nicely cut in half.My saw wont do this as it causes the joint to slip about and I end up with a ragged cut down one side of the upstanding vertibra. Beyond putting the joint in the work mate what can I do? Would a finer longer saw help?