The Calixas 131 is really an extension of the highly popular first model, the Calixas 105. However, the main difference is that the 131's overall design and arrangement seems to be proportioned better over the former. In addition to this, the 131 design incorporates a retractable heli-pad at the aft of the Bridge- Deck. According to Calixas, the first 131 or "C3" is under construction and also represents their willingness to expand so early in the life of the company. The overall design on paper looks stylish... For more information visit the Calixas website at: http://www.calixas.com/downloads/CalixasC3GAweb.pdf http://www.calixas.com