I worked on my project trumpet again today.  Most of my day consisted of me trying to get the dents out of my main tuning slide crook.  It was dented from both sides.  I didn't get very far with dent balls, so I had to unsolder one of the slide tubes.  Then I used dent rods, draw plates, tapping and burnishing to try to remove the dents.  I did what I could, but it doesn't look perfect.  I was ready to solder everything back together, but it didn't fit together right.  I had to sand one end of the crook.  (This makes more sense if you look at the picture).  I finished the day by soldering my slide tube back on the crook.  You can see more pictures of this process in my "Project Trumpet" page.