The idea that nuts and bolts evolve doesn't work.
Not only that every variety of conveyance in the universe will have essentially the same parts ~ top, bottom, front, back, left, right, up, down, electrons ~ all the features of "charm" ~ it's memes all the way down ~ not turtles at all.
So, what's the independent factor in all this? Well, that'd be the empty spaces and how they are defined by "stuff".
Great analogy...mind if I use it on occasion? I will give the credit to a native American woman.