You need to find some way to use just one extender coming off the Snapper and attach both Z-teks to it. You'll need the eFFe glitch to do that. That's where you hover a component over an attach point on a spinner, spin the spinner, and then attach the component when it's floating out in space. Go to the bot lab and back and all the components will go back to normal.
Also, Spartan2 is better than Spartan3.