Thingiverse offers a customizer option that allows you to build a simple GUI to change variables. It is really the same as the first case, but the application picks up simple comments to describe ...

I had lots of fun downloading existing designs from sites like Pinshape and Thingiverse, but eventually I wanted to create objects of my own.

But here is the problem with Thingiverse: even if you would like to get away from using this Makerbot service, it’s still the largest collection of 3D printed objects on the Internet.