

Both the screw and bolt need to be sawn down the middle along the last inch or so of their lengths. Then you need to drill a hole through them that lines up with the holes that are located at each end of the blade. (The blade that I bought from Highland Hardware had holes, otherwise, you'll have to drill them yourself.)

You need to cut the head off the lag screw so you can add a washer and nut to that end. By tightening the nut, the blade is tensioned.
At the other end of the frame is a carriage bolt that does not need to move. After I drilled the hole in the arm for the carriage bolt, I squared up the top of the hole so the carriage bolt can drop down into it, locking it in place.
At this point, you have a workable saw that will be murder on your hands.
Now comes the fun part: shaping the arms and stretchers to make the saw more comfortable to use and easier on the eyes.