I too have built the FT bloody wonder it flies looks similiar to the SIG and flies decent. But what I will say is the balsa SIG probably has twice the speed of the bloody, if you strap an O.S. 15 in one it's close to 3x faster. I like speed. I'm not putting the FT boys down, the bloody wonder is nice. But I promise you, if you try a SIG wonder you'll love it. Like I said, I scratch built the green one in the photo from plans, It has a Power 10 Supertigre with a 30A Esc with a 9x7 prop and on a radar gun we clocked it at 132 mph. Can't beat em!!