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I love this design. I have all of the parts and I am so close to a final assembly. However, I have not worked with servos before and I am having a hard time getting the feet and legs to stay together. I have seen the pictures but they are not very detailed. Do the plastic pieces just snap into the white part on the servos. They fit in there but they do not stay attached. I don't see any other screw holes to attach the legs. And where do you put the power? Do you think a 9V connected directly to the USB would work? Just not sure where to put he battery once it is hooked up because it does not fit inside. Do you have any more assembly directions?