I was having some problems with the arms and legs falling off of my puppet until I remembered that someone mentioned 'dinking' the k&s. All that needs to be done is lightly dent the k&s to create some friction between the two peices.
The top photo show my test piece. I originally dented the k&s when both pieces were together. I underestimated how soft the brass was and had a tough time getting them apart again, which is no good if you need to quickly replace a broken appendage.
For my second attempt I only dented the outer piece of k&s, this worked much better. The pieces hold together well and only need a gentle tug to pull them apart.