I know this has been discussed a few times here, and the detailed write ups by George and Bob are indeed very valuable. I have a slightly different problem. I have a couple of back saws which have a slight "wave" across the length of the blade on the business end. The spline is dead straight. In one case the spline is epoxied in so I can't move it in anyway, the other has the spine hammered pretty hard and from what I can tell the blade is touching the spline on both ends so it is not the case of the blade crawling out of the back. I don't have the heavy hammer required by the Smalser approach or a metal vise/anvil to use as the base for striking. I have a run of the mill hammer and I can probably use the concrete floor as the work surface.
So do I have any option to try and fix these two saws?