I just realized that I severly muffined this thread, sorry!
Back on topic, I like the idea of the thumb-cup on the left arm-rod. Would seem to make it better if you just felt like clipping your puppets' right arm to his chest/belly area for cramped puppeteering.
I can see the practicality of using a tong-like rod attachment though, especially for timed clapping.
Gonna hafta finish up the Christmas portraits I'm working on so I can make another puppet. I'm thinking an Anything Muppet type puppet would be great for me right now, but what do I use to make his arm-rods?