Make sure you have enough hose clamps (shown to the left of the didj) to clamp the two halves together with a spacing between each of 3 or 4 inches. Make sure you have the right size of clamps to accomodate the different diameters you will encounter along the length of the stalk.

Put a generous bead of resin, or glue, along the whole length of the two sides of one of the halves of the stalk. Don't worry about the mess inside or out. Just make sure you get a lot on the edges.

Next fit the two halves together and line up the edges and ends, top and bottom, as shown in the second photo above.

Next start clamping the two halves together. The method I use is to put the first clamp right at the edge of the mouthpiece end, make sure the ends line up, and tighten. Next clamp the distal (opposite) end of the stalk, making sure the end and edges line up. The third clamp will go in the center of the stalk, then each one after that I just divide the distance between the clamps furthest apart until there are clamps every 3 or 4 inches along the stalk.

A special note for large bells... I do not have a large hose clamp to accommodate most big bells. Additionally these bells tend to have more uneven surfaces so a hose clamp would prove difficult to use anyway in this area. So I use a strap clamp. This consists of a long, wide strap that can be hand tightened to a point then it has a ratcheting device that I can tighten with a screwdriver or wrench. I have used one of these in the picture above. You can see the long tail of the strap along the right edge of the photo.