It's been a long time I have a question. I working on a prop the is a puppet and I would like to figure out an arm mech that would give me the best range of motion. I figure I could use a pan and tilt for the for the first joint of the shoulder , SO I have up down front and back, but after that where the elbow would be i get lost should i do a cable like mech and down to the wrist do the same. I believe the org. was done with rods and a waldo but I was going to use an arduino so i can pre program it on a timer . this is just for personal use so crude is fine. I never seen something like i'm talking about being sone before. Thanks for any info.