Kalt Flying Box (1974)
Introduced to fit the flatbed mechanics being specifically designed for 'training' with the intention that a 'Tyro' would purchase this fuselage at the same time as the scale model of their choice. This was used in lieu of the scale body until the tyro was suitably proficient at which point the mechanics were transferred into the scale body; thus preventing expensive damage to the scale body during the learning stage.
Presented at the Nürnberg show though not under the Kalt name but on an importers stand (MRC); no further info available after that in the European market anyway.