About this 3D model
I found such a thing in a store for 1.49 EUR and I couldn't resist to give it a try. It works amaizingly well (with some limitations) together with the cheapest strong fix hairspray (Laca Isabel: 2.09 EUR in the same store). This thing is not parametric, sorry. I have no idea if it could be suitable for other printers than the Replicator Dual where I am using it.