About this 3D model
I know, there are already tons of them. But I had some specific needs and I simply like to play with customizable openscad designs. It would not be worth if it was not versatile so you will be able to design yours according to your needs. I publish it anyway: having more choices never hurts and people may even find that it suits their needs better in some case, who knows ;) By the way with one wing only, you can make wrenches!