Im not sure I would say that a 50cc is too "heavy" in the Cap. Its still floats like you wouldnt believe and the 3D capabilities are outstanding. Was it designed for a 50cc, no. On the other hand I had a OS 160 in my Cap when I first assembled it, it came in around 12 lbs. Yes, it was still a blast to fly, but I'm a horsepower freak. More is always good, right? Maybe not so in some planes. I just hope Jolly gets his problem taking care of. I for one would really like to know what caused this problem.