I am aware that a DA 50 is the perfered engine because of the weight. However, because of the tuned pipe factor (not to mention the cost) I am seriously looking at the Brison 4.2. It looks like just a little over 1 1/2 lbs more and Andy Kane tells me that can easily be made up by moving the rudder servo(s) and batteries to the tail. Owning a DA, I know they have a ton of power, but I can't imagine them having more than a 4.2.

I was just wondering if anybody else out there is doing this or will I be the first one?

I think you should be fine. I was leaning toward that size engine but bit the bullet, bought the DA with all their pipes. People who have this plane tell me to use Fiber Epoxy on this plane. To save weight, DA is coming out with carbon tubes that will will fit perfectly in the airplane. Hope to have mine built in the next couple of weeks. Nothing better than hearing that whistle when you roll the plane.