What version of Bendtech do you use? I have a very old version of SE . Been years since I even used it . It was very handy when I did use it. Tip for you , forget the punch and torch. Use a soldering iron , the screwdriver type , you can but a bigger anvil to suit the hole needs. Also do you guys ever use PEM nuts or Riv nuts ? I could see a Riv nut working well for the upper chute mount.
We use bendtech pro. The torch is fast. Thats why we use it. We use rive nuts all the time but can pull out of this metal like on that back of the car.