I like that you used zip ties to hold the arms together and then used a bobbin and thread to hold it all together. Bamboo sticks are a good idea too.
The zip ties are very handy, the only thing to really be aware of is that they will mark the wood and the marking needs to be sanded off. I'll try to use soft cord in the future as much as I can or wrap something on the wood before using the zip ties.
Bobbin and thread worked okay, I really just used it because I had it near when looking for something to keep it all together. Even though I used heavy thread (Unifloss thread) it kept breaking off every so often. I need a better material for that, but it was at least precise for the wraps, and soft enough not to cut the wood.
I figured bamboo toothpicks should work, the only drawback is their open pores when you cut them, but I figured they would be pretty strong.
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