The bottoms on both are 90° V grooves ( see photo) This is because I designed them to ride on the workpiece corners. At the moment I just sharpened the blades on both and set them for a project I'm doing so disassembly photo shots not at this time. I attached a photo looking down into the throat. Bed angles for both are 45°. If I were to do again I would maybe go 50°.
I had some tool steel flat bar for making the blades. I annealed first to remove hardening. I used a propane torch and brought to cherry red. I let it cool, and then grinded. shaped, and beveled the
cutting edge at 30°. Then heated up again to cherry red and quenched in oil. Then heated up again to a straw color and quenched in oil again to temper. Finally I honed.