I hope your weights of 12 pounds out of the box are not correct. If they are it will be 19 pounds with a lightweight 50 and 20 pounds with a Evolution 58, this would be 2 pounds heavier than advertised, no longer making it so attractive. Also would add $150 to the price if you have to change out to all CF to lighten it.

At 19 pounds the lightweight 50 is not enough power in my opinion. I have a 16 pound airplane with a DA-50 and at times wish I had more power, but it all depends on your flying style.