i'm very interested in what your trying to do, but i think you need to get your hands on a real spider before you go and make one.
first, the little holes on the spider have metal in them to ease the bending action it makes.
also, you'd want to make two different center hole sizes for the williams and happ spiders your looking to make. if you just went to stretching out the holes, the spiders wont last as long as they could.
lastly, i'd just like to repeat that you should just get your hands on a stick so that you can see what you need to design.
i hope this goes well, cause i'm already lookin at those tron sticks and handles but can't justify getting a happ without more support.