- Living in: Graz - Austria (central Europe)
- email: Manfred Rosenberger
- 2005 - Framebuilding Course: Handwerkskammer Rhein-Main, Frankfurt (Germany)
- 2012 - EHBE : Schwäbisch Gmünd (Germany)
... rattleCAD ist free. Feel free to support the author and donate to the project in case of saving time in design and build your new bike or do some investigations in bicycle geometry.