I would not risk it. How ever you cut it there will be tissue damage and a chance of fungus,decay, infection and such.
I believe i read something about wrapping an elastic band around a wall hammer and letting the gentle pressure of the band kind of cut thru the tissue over a couple of weeks then you can cut with a saw with out endangering the tissue.
Please research this method, i could be wrong!
Pick your self up some branching varieties and then you can go frag crazy.