Step 3: Gluing the Tubes into the Barrel Blanks
Once the hole is drilled, grab the brass tubes that came with the pack. using relatively rough sandpaper, scuff up the tubes until they're no longer shiny. Once that's done, put a dab of gorilla glue on a scrap gluing surface (a paper plate works great) and a few drops of water on the brass tube (water helps the gorilla glue expand). Roll the tube in the glue and insert it in the barrel with a twisting motion. This is done for both tubes. Insert the tube into the corresponding barrel blank (long tube in bottom barrel, short tube in top barrel). Gorilla Glue is ideal because it expands 3-4 times with moisture, holding the tube securely in place.