Derek Benstead has brought up to date the popular sporty Keil Kraft control-line stunt design of the 1950s and introduced radio control to make it even more fun to fly than the original. All wood construction. Not for beginners. Building your model from a Sarik Hobbies ‘Laser Wood Pack’ semi-kit removes the need to trace and cut your own intricate parts. It will be necessary to purchase additional sheet and strip wood from your local model shop to complete the model.