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A big Scratch Cat was designed and creating in the following way, according to a Scratch Team member: The Lego company very generously helped us create a version of the Scratch cat made of Lego. My friend Duks and I made a 3D model using Rhino, and we sent it to Lego for fabrication. A few months later we got a big crate containing... this! Source: ...


The cheapest way to go about doing this is to design it yourself, like you said, using one of the LEGO cad softwares (LEGO Digital Designer, LDraw, MLCAD, etc.). Then, buy the pieces and build it. However, that takes a lot of time, and unless you are experienced, may not turn out so good. The easiest (but also likely expensive) way to do this is to hire a ...


If you don't need the arm to be extendable then you might get some ideas from the various Technic sets that feature cranes or claws, like the 8868, 8479, 8436, 8110 or 9397. These offer multiple alternatives, as in pneumatical or purely gear-driven solutions, can be scaled up with appropriate supports and mounted on your own arm designs.

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