About this 3D model

these are some parts i need for my repstrap but i thought i would share them any how.for the most part you can make them with any flat materal the middle and top piece are the same piece pretty much i just added the other things to it so that i could get a better feel for it, they are pretty simple but thats not a bad thing,http://mike-mack.blogspot.com/2010/11/i-have-got-my-idea-down-now-to-find-way.html