Set Digital icon Set Digital — Toggle a digital I/O port between TTL low (0V) and high (3.3V/5V) in ARC; select board and port, simple on/off control-signal only. Try it →

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#1  

Sorry, don't mean to be negative, but kinda' looks (as you say) cheap and clumsy... Mind you, I would not attempt this myself, rather I would opt for a commercial version if one existed for superior control and functioning...

#2  

If built right, this could be a cheap(but somewhat sturdy) alternative to the overpriced metal arms we see today.