The Department of Robotics at the Technical University of Ostrava has disposed of the Rapid Prototyping technology (hereinafter as RP) since 2009. From the very beginning, there were efforts to print not only models to present various concepts and prototypes to the public, but primarily functional technical solutions. Over the time, there have been a large number of printed parts as well as functional units with the print share reaching up to 80%. Related to the need to adjust the models for printing in order to achieve the best results, both for own and commercial production, there have been many doubts how to suitably solve certain construction elements. The paper describes some of problems that have arisen and tries to find adequate solution using experimental methods. The paper is designed as a review of the solved issue aiming at providing a set of findings which can be subsequently used in designing parts produced by the RP technology, on condition that professional production systems and polycarbonate materials with mechanically removable support are used.