unfortunately he built only one. for himself
strange, that no one came up with a small edition of clones yet
The bergfotron ALL his designs he give for free are FULL of errors (all his layouts don't match with the schematics) and when you ask him questions or tell his stuff has errors the door is closed,so its clear that he don't like his stuff get cloned or built its rather just a big boasting show off site.
You friend did a great job but din't also released a full guaranteed error free documentation yet if i recall...