New Pro-Cut Ultra Series. YAK 860 NOW AVAILABLE AS A MEGA DEAL £74.95. These 2 new aircraft represent over a years development of the lightest most rigid 3D planes we have ever made. The Yak860 (34" wingspan) is great for indoors in a larger hall or for outdoor flying. The Yak725 (28.5" wingspan) is perfect for average size halls and outdoors on a calm day or evening. The 2 kits are available as a kit or as a deal including power system, The Yak725 is available in our Mega Deal.