Making the cannon barrels. I like to edge glue the small round parts as tabs just get in the way and leave stiff spots in the final part. So after rolling the part around a toothpick I apply a small amount of glue to the edges and then insert it into a circle gauge (used by draftsmen) hole of the right size for the smaller diameter. Then work my way up the part and moving to the next larger hole until glue is set. The circle gauge maintains circularity in the finished part.
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