Looking at that last picture I can see the inlet wasn't level on the back of the handle, which explains some things...
Anyway, once it fits flush with no overlap on the ends, nail one end down. One hole at a time, use a clamp to hold the silver tight to the wood if you can. The following pics show a series of how I fixed a mistake (I'm told that's the best part of my demonstrations, I always screw up and then show how to fix it), but this time the camera malfunctioned and a lost a few important shots. In the first pic, the band is mostly nailed on, but there's a nail missing. I u