OK So moving on , so now you take all the channel parts you cut on the band saw, and start checking your bend angles, follow the plans!!. You measure twice, drill once, put you temporary rivets into the drilled holes do that you can stabilize your project. The silver clecos are used initially before you up drill for the 1/8th rivets. Later in the project you may see copper colored rivets, the are the final size clecos for the rivets