I disagree. I flew one many times with a OS Gemini 1.20. It didn't have floats but had plenty of power. That being said, it would not hang on the prop, but it's a Cub. This one was a 1/4 Scale Balsa USA kit built. I don't recall the weight. It was covered in iron on fabric and had the full wing. Only other advise I would give is put as much of the equipment as you can to the front. The nose is so stubby it was hard to get the CG right. Even with the flight battery and battery for the on board glow it needed some lead.
David