it is my guess that the high speed steel is welded to a softer metal so you would need to have the cutting point in the HSS portion of the saw blade.Pretty sure that welded edge means hardened teeth, with a soft back. So not an even heat treat all through the blade.
It has about 1/4" of hardened steel, I cut it on a 50 degree angle and ground a small angle on the hardened side. I drilled for and put 2 steel pins in the handle and put it all together with JB Weld, I will post a picture when I finish it. Thanks for all of the comments.