One thing thats not being addressed in the thought process is the difference in the cost of fuel. The Webra will run fine on 15% while at the Nats this year many of the competitors using the YS DZ were forced to run 30% Heli fuel. Do the math and you will see that the Webra is alot cheaper to own as well as operate. With the new style wide bodys and the larger diameter props run on the Webra downlines aren't a problem. I for 1 am selling all my YS engines and replacing them with the Webra 1.45 2 stroke. One other thing is that I believe the Webra runs about as efficiently as the DZ.