Ok guys. Just finished another attempt and I'm pretty pleased. I stopped at my local rockler this afternoon and picked up a better Japanese saw and a cheap marking knife. I also whipped up a quick jig to help me out. I was clamping the stock to my bench with a squared up chunk of 2x4 to use as a fence/chisel guide. I found that to be pretty akward lining the edge of the guide on my scribe line and then holding it there and getting clamps tight, then I have to do it again when I flip the stock and it better be right on or the joint would suffer. So while I was working today a design came to mind. It worked great.all I have to do is hold the opposing part flush with the part I'm chopping and slide the fence over to it and tighten. Only thing I might add is some sticky sand paper to the base to keep the part from sliding, this wasn't a real problem but it did move just a bit cutting throughout a bit of wild grain/small knot area in the walnut piece.I did watch a couple of Paul sellers videos, man he moves quick.
pit bulls rock!