RE: Is bigger always better?
U-CAN-DO airplanes, whether it is the .40 size or the 120 size are basically what you make them. They can be very docile or aggressive it all depends on how you set it up. They are not a fast airplane, as a matter of fact there is a warning furnished with the aircraft that cautions you about full throttle flight. I personally think the 60 size is an excellent 2nd airplane. The 120 size shouldn't be any different as far as one's ability to fly it. Start with gentle throws and work your way up to the more aggressive maneuvers. I say, buy it, build it, and fly it, you'll love it. Surely there are members of your club who have owned a UCD and can offer their advice on setting it up.
Regards,
doubledee