RE: Radian pro
I have one of these radian pro's and mine for some reason was either molded heavy or something odd. Mine was the PNP version and was terribly tail heavy if you assembled it per the intructions. I had to move the lipo battery all the way forward and even add 3 ounces of lead in the nose.. to balance it. There are molded cavaties for evereything so really there should have been no changes needed.