Squirrels have fuzzy tails.

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Yes, thank you, but how do I make the teeth spaced correctly? What angle apart does each tooth have to be from the last one? How do i determine the length of the pegs?

CAD is only useful if you are modeling what you already have worked out. So how do I determine the length of the pegs so that they do not jam?

but to raise/lower an arm the teeth would take a beating and eventually shatter.