As far as I know, it is the first
Don't get why you think it's lame. Each of these arms (as you call them) has the knowhow to build another arm that can build another arm that...
And DaVinci's primitive "helicopter" drawings are so lame, I don't know why the Italians aren't embarrassed to publish them. Model A sucked - you couldn't get it on the freeway. Wright Bros. were idiots to create such a lame plane.
Lotta nattering nabobs around here.